# Montana factory-built building approval: the mechanics Layer 2. How you actually get from an empty plant to a labelled unit leaving the yard. This document covers process. The statutes and rules themselves are covered separately in `docs/montana/01-statute-and-rules.md`. Rules are cited here only where they drive a step. All research done 2026-09-13. Every factual claim below has a source URL and fetch date in the Sources block at the end of each section. Where I could not confirm something, it says **NOT CONFIRMED** and states the open question. --- ## 0. Who you are dealing with, and one thing to read first The program is the **Factory-Built Building (FBB) Program**, run by the **Building Codes Program** inside the **Building and Commercial Measurements Bureau**, Business Standards Division, Montana Department of Labor and Industry. | | | |---|---| | Mail | Department of Labor and Industry, BCB, PO Box 200517, Helena, MT 59620-0517 | | Physical | 301 South Park Ave., Floors 4 and 5, Helena, MT 59620 | | Phone | (406) 841-2056 | | Fax | (406) 841-2050 | | Email | buildingcodes@mt.gov | | Online portal | https://aca-prod.accela.com/bcb/Default.aspx ("Online Factory-Built Building Permit") | **Read this before you do anything else.** On 21 September 2024 the whole factory-built building rule set was rewritten and renumbered. The old rules in ARM subchapter 24.301.5 were repealed or moved to a new subchapter 24.301.12. At the same time Montana adopted two national off-site construction standards by reference: - **ICC/MBI 1200-2021**, Standard for Off-site Construction: Planning, Design, Fabrication and Assembly - **ICC/MBI 1205-2021**, Standard for Off-site Construction: Inspection and Regulatory Compliance The state's own FBB web page and both paper application forms still cite the **repealed** rule numbers (the insignia form cites ARM 24.301.558, repealed 9/21/2024; the FBB web page cites ARM 24.301.565 through 24.301.567, of which .565 and .567 were transferred and .566 was repealed). The web page also still lists the **old** eleven-item quality control manual contents. The rule now in force says the quality assurance manual must contain what **chapter 5 of ICC/MBI 1205** requires. Practical effect for Ken: do not build your QA manual off the state web page. Build it off ICC/MBI 1205 chapter 5 and then ask the Bureau in writing whether the old web page list is still what they want to see. You will need to buy the two ICC/MBI standards from ICC either way, because the state adopted them by reference and does not republish them. ### Sources (section 0) - Factory-Built Buildings Permits, Montana DLI Business Standards Division. https://bsd.dli.mt.gov/building-codes-permits/permit-applications/factory-built-buildings/ (fetched 2026-09-13) - ARM 24.301.1203, Incorporation by reference of ICC and MBI standards. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1203 (fetched 2026-09-13) - ARM 24.301.1223, In-plant quality assurance manual. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1223 (fetched 2026-09-13) - ARM 24.301.558 (repealed 9/21/2024). https://www.law.cornell.edu/regulations/montana/ARM-24-301-558 (fetched 2026-09-13) - ARM 24.301.565 (transferred to 24.301.1261). https://www.law.cornell.edu/regulations/montana/ARM-24-301-565 (fetched 2026-09-13) - ARM 24.301.566 (repealed). https://www.law.cornell.edu/regulations/montana/ARM-24-301-566 (fetched 2026-09-13) - ARM 24.301.567 (transferred to 24.301.1265). https://www.law.cornell.edu/regulations/montana/ARM-24-301-567 (fetched 2026-09-13) - Application for Factory Built Building Insignias (Rev. 7/24). https://bsd.dli.mt.gov/building-codes-permits/permit-applications/factory-built-buildings/FBBP_INSIGNIA_APP_ADOBE_F.pdf (fetched 2026-09-13) --- ## 1. The end-to-end sequence There is **no separate manufacturer licence or registration fee** in Montana. You become an approved manufacturer by getting a model plan reviewed and approved. The rule says so directly: manufacturers applying for model plan review, once approved, are listed as an approved manufacturer in the state of Montana (ARM 24.301.1217(2)). The one thing you cannot skip is the **third-party inspection agency**. Both Montana application forms mark the third-party inspector field `***required***`, and the plan review rule requires the application to name the approved third-party agency responsible for inspections (ARM 24.301.1221(2)(c)). Montana does not let a manufacturer inspect its own production for insignia purposes. | # | Step | Who does it | What it produces | |---|---|---|---| | 1 | Confirm the product is a "factory-built building" | Ken, with the Bureau | A written answer you can rely on. See the open question in section 10 about the skid shower house. | | 2 | Hire an approved third-party inspection agency | Ken | Signed contract. The agency must already be on Montana's approved list, or must apply (section 4). | | 3 | Write the in-plant quality assurance manual | Ken (often with help from the agency) | QA manual per chapter 5 of ICC/MBI 1205 | | 4 | Submit the QA manual, with the $20 QA manual review fee | Ken to the Bureau | Bureau review. The manual must be reviewed and approved **before** plan review approval (ARM 24.301.1223(2)). | | 5 | Submit the model plan review application | Ken to the Bureau | Application for Approval of Factory Built Building, plans, specs, calcs, the plan and system review fees, the named third-party agency, and the chapter 3 ICC/MBI 1205 plan approval items | | 6 | Plan review | Bureau plan reviewers (structural, electrical, mechanical, plumbing separately) | Either approval, or a written plan correction notice within 30 business days | | 7 | Correct and resubmit if needed | Ken | 60 days to respond, or it becomes a new application with new fees | | 8 | Plan approval, manufacturer listed | Bureau | You appear on the Approved Factory Built Building Manufacturers list with an FBB number. Plan runs through 31 December of the following year. | | 9 | Initial plant certification | Third-party agency | 100 percent inspection of the aspects of construction on not fewer than one module, plus verification that your QA process actually functions. Written certification report to you and to the Bureau. | | 10 | Production begins; ongoing in-plant inspections | Third-party agency | Written or electronic inspection report after each inspection listing every deficiency. The agency may only issue labels after all deficiencies are corrected. | | 11 | Bureau oversight | Bureau inspectors | The Bureau may make periodic inspections and may condition issuance of insignia on compliance. Out-of-state manufacturers may be subject to at least one on-site review per year (that clause does not bite an in-state plant). | | 12 | Apply for insignia, per unit | Ken to the Bureau | Application for Factory Built Building Insignias plus $40 per section. You must give model name, model number, serial number(s), the FBB number, and the Montana destination. No exceptions, and incomplete applications come back unprocessed. | | 13 | Affix the insignia | Ken (the manufacturer, not the agency, not the dealer) | ARM 24.301.1243(2). Each insignia is assigned to a specific unit and is not transferable. It stays the property of the Bureau and can be revoked or confiscated. | | 14 | Ship | Ken | The unit must bear the Montana insignia, plus the reciprocal state's or the certified third-party agency's insignia where applicable | | 15 | Retail / dealer stage | Dealer or Ken | Bureau inspectors may walk any premises in Montana where units are sold or offered for sale, announced or not, to check for insignia | | 16 | Site work | Owner, local AHJ | Zoning, utility connections and foundation permits are still required by the authority having jurisdiction. Everything else in the unit is accepted statewide without further inspection or fees. See section 8. | Two things about step 13 and the insignia that bite people: - An insignia must be **used within 12 months** of issuance. After that it is void, there is no refund and no credit, and you have to buy a new one for that unit (ARM 24.301.1243(3), ARM 24.301.1247(2)). Do not stockpile insignia. - A lost or damaged insignia gets replaced free on written notice. A **void** one does not. Damaged, void or later-found insignia must be returned to the Bureau or destroyed, and no duplicates are allowed (ARM 24.301.1247). ### Sources (section 1) - ARM 24.301.1217, Manufacturer registration. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1217 (fetched 2026-09-13) - ARM 24.301.1221, Application for model plan review. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1221 (fetched 2026-09-13) - ARM 24.301.1223, In-plant quality assurance manual. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1223 (fetched 2026-09-13) - ARM 24.301.1225, Nonconforming application and plans. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1225 (fetched 2026-09-13) - ARM 24.301.1211, Bureau inspectors. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1211 (fetched 2026-09-13) - ARM 24.301.1215, Inspection of retailer. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1215 (fetched 2026-09-13) - ARM 24.301.1241, 1243, 1245, 1247, Insignia of approval. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1241 , /ARM-24-301-1243 , /ARM-24-301-1245 , /ARM-24-301-1247 (all fetched 2026-09-13) - ARM 24.301.1265, Miscellaneous fees (out-of-state on-site review). https://www.law.cornell.edu/regulations/montana/ARM-24-301-1265 (fetched 2026-09-13) - Montana Certification Application for Third Party Inspection Agencies - Factory Built Buildings (initial plant certification and ongoing inspection commitments). https://bsd.dli.mt.gov/building-codes-permits/permit-applications/factory-built-buildings/3rdPartyInspCertApp.pdf (fetched 2026-09-13) - Application for Factory Built Building Insignias (Rev. 7/24), as above (fetched 2026-09-13) --- ## 2. Every form and document Montana asks for Montana does **not** publish a bound "manufacturer application packet" the way Washington does. It publishes three loose forms plus a web page. That is the whole kit. | Document | Real title on the form | Revision | URL | |---|---|---|---| | Plan review / manufacturer application | **Application for Approval of Factory Built Building** | Rev. 4/23 | https://bsd.dli.mt.gov/building-codes-permits/permit-applications/factory-built-buildings/FBBP_APPLICATION_ADOBE_F.pdf | | Insignia (label) order | **Application for Factory Built Building Insignias** | Rev. 7/24 | https://bsd.dli.mt.gov/building-codes-permits/permit-applications/factory-built-buildings/FBBP_INSIGNIA_APP_ADOBE_F.pdf | | Third-party agency certification | **Montana Certification Application for Third Party Inspection Agencies - Factory Built Buildings** | undated | https://bsd.dli.mt.gov/building-codes-permits/permit-applications/factory-built-buildings/3rdPartyInspCertApp.pdf | | Approved manufacturer list (reference) | **Approved Factory Built Building Manufacturers - Montana** | dated 9/02/2026 on the sheet | https://bsd.dli.mt.gov/_docs/building-codes-permits/FBBManufacturersWeb-2026.pdf | | Online alternative to the paper forms | Online Factory-Built Building Permit (Accela) | live | https://aca-prod.accela.com/bcb/Default.aspx | **None of the three forms carries a form number.** They are identified by title and revision date only. Do not invent one. ### What the plan review application asks for Fields: manufacturer name and address, parent company if any, **third-party inspector (required)**, type of submittal (New / Revision / Renewal), model type (Commercial / Residential / Other), model name, model number, the fee schedule with boxes to tick, signature and date. Footer: "Plans must be sent by cd, thumb drive, drop box, email, or paper (no larger than 11x17)". Header warning: "ALL INCOMPLETE APPLICATIONS WILL BE RETURNED UNPROCESSED". ### What has to go with the plans From the state web page (typical structural design approval), general: - Dimensioned drawings and specifications clearly showing the nature and extent of the work - An electronic copy of everything, or one paper copy no smaller than 8.5 x 11 and no larger than 11 x 17 Specific structural: - All necessary cross sections - Floor, wall, ceiling and roof construction details - Typical connections - Design live and dead loads - Grade and quality of materials - Substantiating calculations or test results where required Electrical: type and size of feeder assembly; voltage and amperage of branch circuit panelboard; branch circuit identification, amperage or overcurrent device, wire size and type; voltage and amperage of fixed appliances; calculations per NFPA 70. Mechanical: description of all materials, appliances, fittings, pipe, tubing, vents and ducts; BTUH input rating of all fuel burning appliances; size of combustion air openings; size, length, type and location of vents and vent connectors; type, minimum dimension and gauge of air ducts; minimum free area and location of circulating air supply inlet; minimum free area and location of all air openings. Plumbing: description of all materials, fixtures, fittings, pipe, tubing, shower stalls and walls; diameter and type of pipe and tubing and length of all trap arms; size and type of fittings; grade of drainage piping; method of securing all piping. Systems can be approved once and referenced on later plans. Montana designates typical systems with the letters **E, M, P**. From the rule, additionally: - All applicable plan approval items in **chapter 3 of ICC/MBI 1205** - The **first page of the construction document** must show wind load (Vult), construction type, seismic design category, and ground snow load (ARM 24.301.1221(2)(e)) - If the site is unknown (non-site-specific), the building must be designed to at least **115 MPH wind, seismic design category D, and 30 psf snow** (ARM 24.301.1221(3)) That 30 psf figure is a floor, not a pass. Most of Montana carries a far higher ground snow load. See the open question in section 10. ### Quality assurance manual Rule in force: contents per **chapter 5 of ICC/MBI 1205**, submitted prior to or with your first plan review request, with the $20 review fee, reviewed and approved by the Bureau before plan approval (ARM 24.301.1223). Revised manual goes back in with another $20. The **older** list still printed on the state web page, which the Bureau may still expect to see covered, is: scope and purpose; inspection procedure for basic materials; material storage and stock rotation; drawings and bill of material; types and frequency of product inspection; sample inspection control form; record-keeping procedures for QC forms; list of major production equipment; where responsibility for the QC program lies; test procedural manual covering electrical, gas line, water systems and drain/vent/plumbing fixture tests and the test equipment used; list of test equipment. The same page also says you must designate a company or corporate officer or other responsible person for the program and keep records substantiating that each unit was inspected and complies with the reviewed plans. Cover both lists. They overlap heavily and the old list is a good checklist anyway. ### Sources (section 2) - Application for Approval of Factory Built Building (Rev. 4/23), PDF as linked above (fetched 2026-09-13) - Application for Factory Built Building Insignias (Rev. 7/24), PDF as linked above (fetched 2026-09-13) - Montana Certification Application for Third Party Inspection Agencies, PDF as linked above (fetched 2026-09-13) - Approved Factory Built Building Manufacturers - Montana, PDF as linked above (fetched 2026-09-13) - Factory-Built Buildings Permits web page, URL as in section 0 (fetched 2026-09-13) - ARM 24.301.1221 and ARM 24.301.1223, URLs as in section 1 (fetched 2026-09-13) --- ## 3. Fees All Montana FBB fees are set in rule. The schedule printed on the paper application matches ARM 24.301.1261 and ARM 24.301.1263 exactly, so both the form and the rule agree on the numbers. ### Plan and system review, ARM 24.301.1261 | Item | Fee | |---|---| | Quality control manual review | $20 | | Third-party inspection agency application review | $20 | | **Units with one or two parts** structural | $325 | | plumbing / electrical / mechanical, each | $35 | | **Units with three or four parts** structural | $450 | | plumbing / electrical / mechanical, each | $55 | | **Units with five or more parts** structural | $650 | | plumbing / electrical / mechanical, each | $75 | | **Plan resubmission or revision** structural | $125 | | plumbing / electrical / mechanical, each | $20 | | Plan supplement | $20 per unit | | Plan renewal | $100 | ### Insignia, ARM 24.301.1263 **$40 per section.** One fee covers building construction, plumbing, electrical and mechanical. ### Miscellaneous, ARM 24.301.1265 | Item | Fee | |---|---| | Field technical service, first hour or part | $45 | | Field technical service, each additional 30 minutes or part | $25 | | Out-of-state manufacturer on-site review, inspection | $45 per hour, not to exceed 8 hours in any one day | | Out-of-state manufacturer on-site review, travel | Actual published airfare or equivalent between Helena and the point of inspection, plus surface transport, food and lodging at Montana out-of-state per diem and mileage rates under 2-18-501, MCA | ### What this means in real money for Ken's two products My arithmetic off the published schedule, not a state quote: | | 40x28 house, shipped as 2 modules | Shower house, 1 module | |---|---|---| | Structural review | $325 | $325 | | Electrical | $35 | $35 | | Mechanical | $35 | $35 | | Plumbing | $35 | $35 | | QA manual (first submission only) | $20 | included above, one manual covers the plant | | **First model, plan review subtotal** | **$450** | **$430** | | Insignia, per unit built | $40 x 2 sections = $80 | $40 | | Annual plan renewal, per model | $100 | $100 | So the entire state-fee cost of standing up one house model and one shower house model, including the QA manual and the third-party agency's $20 application if the agency is not already listed, is under $1,000. The state fees are not the expensive part. The third-party agency's own contract is, and Montana does not publish or control that price. **Not found:** there is no manufacturer registration fee, no annual manufacturer licence fee, and no plant approval fee in ARM 24.301.1261, 1263 or 1265. **NOT CONFIRMED** whether the Bureau charges anything for a first in-state plant visit; the only inspection fee lines in rule are field technical service and the out-of-state on-site review. **Ambiguity worth clearing with the Bureau:** the review fee rule says "parts," the insignia rule says "per section," and the definitions rule says "unit" has the same meaning as "module" in the ICC/MBI standards. Whether a two-module house counts as a unit with two "parts" is the obvious reading, but get it in writing before you budget a product line around it. ### Sources (section 3) - ARM 24.301.1261, In-state plan and system review fees for factory-built buildings. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1261 (fetched 2026-09-13) - ARM 24.301.1263, Insignia of approval fees. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1263 (fetched 2026-09-13) - ARM 24.301.1265, Miscellaneous fees. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1265 (fetched 2026-09-13) - ARM 24.301.1205, Definitions ("unit" means "module"). https://www.law.cornell.edu/regulations/montana/ARM-24-301-1205 (fetched 2026-09-13) - Application for Approval of Factory Built Building (Rev. 4/23), fee schedule on the form (fetched 2026-09-13) --- ## 4. Third-party agencies ### Montana requires one, it does not merely allow one Montana's own inspectors exist (ARM 24.301.1211) but the plan review application must name an approved third-party inspection agency responsible for inspections, and both paper forms mark that field required. Treat the agency as a mandatory vendor, not an option. ### How an agency gets on Montana's list Per ARM 24.301.1213 and the certification form: 1. Meet the requirements of **Section 401 of ICC/MBI 1205** 2. File the Montana Certification Application for Third Party Inspection Agencies with a **$20** application review fee 3. Once approved, the agency is listed as an approved third-party agency in Montana The form asks for: agency name and addresses; disciplines sought (Structural / Electrical / Plumbing / Mechanical, ticked separately); years actively engaged in inspection services; and the manufacturers for which the agency provides Montana inspections with contact name and phone. Required attachments: - A copy of an accreditation certificate issued by an **ISO/IEC 17011-compliant accreditation body** for inspection services, **or** a tick box saying the agency is not accredited - A list of key personnel with their primary functions and duties - A copy of the professional licence, or plan review and inspector certifications, for personnel who will perform in-plant inspections. The form notes that an inspector shall only inspect in areas in which they are licensed or certified. Note that accreditation is a "provide it or say you don't have it" item in Montana, not a hard gate. The agency also signs up to specific duties, and these are the ones that shape Ken's plant routine: - **Independence.** No actual or potential conflict of interest, not affiliated with, influenced by or controlled by any present or potential client manufacturer. - **Initial plant certification.** A written certification report to the manufacturer and the AHJ. 100 percent inspection of the aspects of construction on not fewer than one module or modular component, and verification that the manufacturer has a functioning quality assurance process. If the first module fails, more modules get inspected until the agency is satisfied. - **Ongoing inspections.** Inspect each module in a phase of construction to verify the QA process matches the plant certification. The agency itself sets the frequency for a modular component or panelized system. Deficiencies mean additional action. - **Reporting.** Written or electronic inspection report after every inspection, listing each deficiency. **The agency shall only issue labels after all deficiencies have been corrected.** - **Label control.** A documented procedure for maintaining records that control the agency's labels. - **Insurance.** Errors and omissions cover for liabilities arising from its operations. ### Agencies currently approved in Montana Montana publishes the list on the FBB page, last updated on the page as **1/28/26**. Seventeen agencies, including both private firms and other states' programs: | Agency | Location | Phone as listed | |---|---|---| | Action Building Inspection | South Jordan, UT | (801) 254-0817 | | Building Code Solution | South Jordan, UT | (801) 403-8152 | | ICC NTA, LLC | Nappanee, IN | (574) 773-7975 | | Intertek | Coquitlam, BC | (604) 528-8715 | | Minnesota Dept of Labor & Industry | St Paul, MN | (651) 284-5894 | | On The Level Inspections | Manzanita, OR | (503) 871-5570 | | PFS-TECO | Cottage Grove, WI | (608) 839-1013 | | Professional Services Industries - Intertek | Orlando, FL | (407) 304-5560 | | Pyramid 1, Inc | New Paris, IN | (574) 831-4200 | | RADCO | Fountain Valley, CA | (562) 272-7231 | | State of Colorado Division of Housing | Denver, CO | (303) 864-7836 | | State of Idaho Division of Building Safety | Meridian, ID | (208) 839-9239 | | State of Nebraska | Lincoln, NE | (402) 471-0024 | | State of Washington | Olympia, WA | (360) 902-5218 | | T.R. Arnold & Associates Inc | Elkhart, IN | (574) 902-5218 | | UL LLC | Northbrook, IL | (657) 286-8447 | | Vinson Inspection Services, Inc. | West Jordan, UT | (801) 897-7485 | For a plant in Montana, the practical shortlist is whoever will actually travel. ICC NTA, PFS-TECO, RADCO, T.R. Arnold and Intertek/PSI are the national names on that list; On The Level Inspections is the nearest geographically at Manzanita, Oregon. Ask each for travel cost per visit before you pick. ### On IAS, HUD DAPIA and IPIA - **IAS** (International Accreditation Service) is the ICC subsidiary that accredits inspection agencies, building departments, special inspection agencies and fabricator inspection programs. I could **not** confirm which IAS accreditation criteria number covers modular or off-site inspection agencies. **NOT CONFIRMED.** If accreditation matters to you, ask IAS directly rather than relying on an AC number quoted secondhand. - **DAPIA** and **IPIA** are HUD **manufactured-home** roles, not modular ones. Idaho's manufactured home installation rule, for example, says DAPIA installation instructions control over the state installation standard. Those roles do not appear anywhere in Montana's factory-built building rules. Do not assume a HUD DAPIA or IPIA designation buys you anything in the Montana FBB program. Whether any specific firm on Montana's list also holds HUD DAPIA or IPIA status is **NOT CONFIRMED** here; I did not verify it and neither should you without checking HUD's own list. - Montana does have a separate **HUD 309 inspection** service, where state building inspectors perform installation inspections on HUD structures statewide. That is the manufactured-home lane and is not the path for Ken's products. ### Sources (section 4) - ARM 24.301.1213, Approval of third-party inspection agency. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1213 (fetched 2026-09-13) - Montana Certification Application for Third Party Inspection Agencies, PDF as in section 2 (fetched 2026-09-13) - Factory-Built Buildings Permits web page, third-party agency table, last updated 1/28/26 on the page (fetched 2026-09-13) - IAS Accreditation Programs. https://portal.iasonline.org/accreditation-programs/ (fetched 2026-09-13, via search result listing) - IDAPA 24.39.34.012, DAPIA installation instructions supersede the Idaho standard. https://dopl.idaho.gov/wp-content/uploads/2023/10/BLD-FBS-Rules.pdf (fetched 2026-09-13) - HUD 309 Inspections, Montana DLI. https://bsd.dli.mt.gov/building-codes-permits/hud-309-inspections (fetched 2026-09-13) --- ## 5. Timelines Montana publishes very little turnaround time for the FBB program. Here is what is actually written down versus what is a guess. ### Published, in rule | Clock | Length | Source | |---|---|---| | Bureau must send a written plan correction notice if plans do not conform | **within 30 business days** of the Bureau's receipt of the application or plans | ARM 24.301.1225(1) | | Applicant window to submit corrections | **60 days** from the date of service of the correction notice | ARM 24.301.1225(2) | | Corrections filed later than that | Processed as a **new application**, new fees | ARM 24.301.1225(3) | | Insignia must be used or it voids | **12 months** from issuance | ARM 24.301.1243(3) | | Plan approval runs | through **31 December of the year following** the original year of approval, and through 31 December of each renewal year | ARM 24.301.1233(1) | | Window to buy insignia for models approved under previous codes after a new code takes effect | **90 days** from the effective date of the new code | ARM 24.301.1233(3) | ### Published, but for a different permit and on a stale page The state's "Is a State Building Permit Needed?" page says two to three weeks is the average time for **state building permit** plan review if plans are complete, depending on Bureau workload. That page is badly out of date. It still refers to adopting the **2000** editions of the IBC and IRC with a September 27, 2002 effective date. Treat the 2 to 3 weeks as a rough historical indicator of Bureau plan review pace for site-built projects, not as a promise for factory-built building plan review. ### Estimated, not published **NOT CONFIRMED:** Montana publishes no target turnaround for factory-built building plan review, no target for QA manual review, and no target for issuing insignia after an insignia application. The only firm number is the 30 business day deadline for a correction notice, which is the outer bound on how long you can be in the dark, not a promise of approval. What you can say safely to a customer: from a complete first submission, the Bureau will either approve or tell you what is wrong within 30 business days, and if you turn corrections around fast you are inside 60 days of that notice. Budget the first model as a **quarter, not a month**, because the QA manual has to clear before the plan can, and the third-party agency's initial plant certification sits after plan approval and before your first labelled unit. ### Sources (section 5) - ARM 24.301.1225, 24.301.1233, 24.301.1243, URLs as in earlier sections (fetched 2026-09-13) - Is a State Building Permit Needed?, Montana DLI. https://bsd.dli.mt.gov/building-codes-permits/permit-applications/building-permits/state-building-permit (fetched 2026-09-13) --- ## 6. What triggers a re-submission | Trigger | What Montana requires | Fee | |---|---|---| | **Change to construction, plumbing, mechanical or electrical equipment or installations**, or a rule amendment that forces one | Application for revision plus one set of supplemental detailed plans and specs of the change | Plan resubmission or revision fees: $125 structural, $20 each for P/E/M | | Supplemental details that **do not** constitute a new model | Filed with, and become part of, the existing plan review | as above | | Supplemental details that **do** constitute a model change | Full application for plan review, same as a new model | New model fees | | **Adding or changing a model designation** | Amended application | Plan and system review fees | | **New model** | Full plan review before construction | New model fees | | **QA manual revised** | One copy of the revised manual to the Bureau for review | $20 | | **Annual renewal, plans unchanged** | Apply before the 31 December expiry. Plans that have not changed do not require resubmission of plans. | $100 | | **Annual renewal, plans changed** | You cannot renew. New application and updated plans. | New application fees | | **Missed the 31 December renewal** | The plan expires. New application required. | New application fees | | **Department adopts a new code cycle** | Renewal of plans reviewed under the previous codes is not allowed. New application, new fees, demonstrating compliance with the new codes. The Bureau also revokes the plan review on adoption of a different code version. You get 90 days from the new code's effective date to buy insignia for models approved under the old codes. | New application fees | | **Bureau finds you are not building to the reviewed plan**, or using materials not listed and reviewed | Plan review revoked | n/a | | **Altering or revising a unit that already carries insignia**, before or during installation | Application to the Bureau naming make and model, serial number, Bureau insignia number, full description of the work with plans and specs where required, location, the alteration fee, and the name and address of the manufacturer or retailer. On completion, request a Bureau inspection and pay the applicable fees. If the alteration does not meet the rule, the Bureau treats the insignia and the related review as **void**. | Alteration fee, plus inspection fees | | Not an alteration: repairs with approved component parts, converting listed fuel burning appliances per their listing, adjustment and maintenance of equipment, replacement of equipment in kind | Nothing | none | Montana is currently on the **2021 I-Codes** (IBC, IRC, IEBC, UPC, IMC, IFGC, IECC, ISPSC, IWUIC), ICC A117.1-2017 and the **2020 NEC**, all effective **June 11, 2022**. The next code adoption is the single biggest scheduled re-submission event in this program. Watch it, because it does not just cost you a re-review, it **revokes** the existing plan review and gives you only 90 days to pull insignia on the old approval. ### Sources (section 6) - ARM 24.301.1227, Changes to reviewed plans. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1227 (fetched 2026-09-13) - ARM 24.301.1231, Plan renewal. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1231 (fetched 2026-09-13) - ARM 24.301.1233, Plan review revocation. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1233 (fetched 2026-09-13) - ARM 24.301.1249, Alteration or revision of a unit bearing insignia. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1249 (fetched 2026-09-13) - ARM 24.301.1223(3), revised QA manual (fetched 2026-09-13) - Current Codes, Montana DLI. https://bsd.dli.mt.gov/building-codes-permits/current-codes (fetched 2026-09-13) --- ## 7. Selling a unit out of state Short version: a Montana insignia is worth nothing outside Montana. Every neighbour handles this differently, and two of the four run programs that will make you do the whole exercise again. | State | Runs its own modular programme? | Who | Does it accept another state's or a third party's label? | |---|---|---|---| | **Washington** | **Yes, strongly** | Dept of Labor & Industries, Factory Assembled Structures programme, WAC 296-150F | No. Buildings constructed offsite and shipped to Washington sites must be approved by L&I, and **must have an L&I insignia before shipping from the factory**. | | **Idaho** | **Yes** | Division of Occupational and Professional Licenses, Factory Built Structures Advisory Board, IDAPA 24.39.31 | Only under a **written and signed reciprocal agreement** between the Division and the other state, which then takes precedence over the rules. Otherwise every modular section must carry a Division Insignia before leaving the manufacturing facility. | | **North Dakota** | **Yes, via the interstate compact** | Dept of Commerce, Division of Community Services, NDAC article 108-02, NDCC 54-21.3 and 54-21.4 | **Yes, effectively.** North Dakota is a **compacting state** under the Interstate Compact on Industrialized/Modular Buildings, so an **IIBC certification label** applied by a designated agency is the route in. Mandatory for anyone building two or more modular residential or commercial structures per year. | | **Wyoming** | **NOT CONFIRMED, most likely no** | see below | see below | ### Washington in a bit more detail Washington's fee schedule is in **WAC 296-150F-3000** and it is an order of magnitude heavier than Montana's: | Washington item | Fee | |---|---| | Insignia, first section | **$402.90** | | Insignia, each additional section | $35.70 | | One year design structural plan review | building permit fee x **0.514** | | Master plan review, valid for the code cycle | building permit fee x **0.734** | | Minimum plan review charge | 2.5 hours x $125.80/hr | | Plumbing plan review | $26.20 + $8.40 per fixture | | Design renewal or addendum | 14.71% of building permit + $125.80 | | Resubmittal | 14.71% of building permit + $125.80 | | Notification to local enforcement agency | $54.00 | | Inspection / reinspection | $125.80 per hour plus travel time and mileage | The building permit fee itself is calculated from square footage times a BVD valuation table by occupancy and construction type, so the plan review cost scales with the building, not with a flat schedule like Montana's. Washington's FAS contact is FAS1@lni.wa.gov, 1-800-705-1411 option 3. ### Idaho in a bit more detail - The Division has **exclusive jurisdiction** to conduct plan reviews of in-plant construction. - Modular permit fees run off Table 1-A by total construction valuation, **plus $90 plus 2.5% of the plumbing, electrical and HVAC installation costs**, plus a plan review amount equal to **65% of the permit fee**. Re-inspections, unspecified inspections and plan review for changes all run **$65 per hour**. There is no refund of plan review fees. - I saw a secondary reference to a **$100 per insignia** Idaho fee, but I could **not** find it in IDAPA 24.39.31 itself. **NOT CONFIRMED.** Ask DOPL. - Big advantage once you are in: an Idaho local enforcement agency **may not** open a labelled unit for inspection, may not impose requirements not equally applicable to on-site construction, and **may not charge permit or plan review fees for any portion of the structure prefabricated away from the building site**. It can require the approved plan set and require permits before delivery. - Installation still gets inspected by the enforcement agency having jurisdiction over the site. ### North Dakota in a bit more detail - Mandatory for a "factory," defined as an entity that manufactures **two or more** residential or commercial industrialized modular buildings per year. Below that you can certify yearly that you are exempt, but then state or local enforcement agencies can inspect the building. - Buildings certified under the programme are deemed compliant and **are not subject to state or local inspections for any building component in the factory**. - On installation, state or local code enforcement may do **nondestructive walkthrough** inspections only, and report violations to the Division of Community Services. Deliver an uncertified unit and the full state and local inspection apparatus opens up on it. - Land use, zoning, setbacks, and all onsite development, construction and inspection stay with state or local government. - Administration runs through the IIBC's **2018 Uniform Administrative Procedures**, incorporated by reference. The Division approves the evaluation and inspection agencies that IIBC designates. - IIBC itself: member states are **Minnesota, New Jersey and North Dakota**. Manufacturers contract with a designated agency, register each participating facility, then order labels. IIBC charges designated agencies a **$4,000** non-refundable designation fee plus annual renewals based on a percentage of gross receipts; the agencies set their own rates to manufacturers. Wisconsin has a separate agreement with Minnesota recognising IIBC-labelled buildings from Minnesota plants. - Programme contact listed on the ND Commerce building codes page: **Alan Solomon**, (701) 328-7931, alhsolomon@nd.gov. The rule itself lists Third-party Inspections Program Manager, ND Department of Commerce, Division of Community Services, (701) 328-5300. ### Wyoming I could not find a Wyoming state modular or factory-built building programme, an insignia, or a manufacturer approval requirement. **NOT CONFIRMED.** What I did confirm: Wyoming has **no mandatory statewide building code** for private buildings, the State Fire Marshal has default enforcement authority under W.S. 35-9-108 and cities and counties can take over local enforcement by adopting standards that meet or exceed the state's, and the State Fire Marshal's published plan review triggers (government or leased buildings, schools, buildings over 5,000 sq ft with public access, assemblies, multi-story, alterations of $40,000 or more, fire protection systems, and so on) say **nothing** about modular, factory-built or off-site construction. **Open question for Wyoming:** does the Wyoming Department of Fire Prevention and Electrical Safety require any state approval, label or in-plant inspection for a factory-built commercial or residential unit shipped in from Montana, or is it entirely the county's or city's call? Call the State Fire Marshal's office before you quote a Wyoming job, and get the answer for the specific county. ### The one thing that works in your favour on reciprocity Montana will **transmit your reviewed plans to a reciprocal state** for you. Make a written request to the Bureau naming the models or system review numbers, and the Bureau transmits the review electronically. The receiving state then runs its own process and tells you yes or no. Montana's bureau chief has authority to enter into reciprocal agreements, and reciprocal status for factory-built buildings may be granted to HUD-approved Category III states. **NOT CONFIRMED:** Montana does not publish a list of which states it currently holds reciprocity with. Ask the Bureau for the current list before you promise anything out of state. ### Sources (section 7) - ARM 24.301.1235, Reciprocity. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1235 (fetched 2026-09-13) - ARM 24.301.1237, Transmission of review materials to reciprocal state. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1237 (fetched 2026-09-13) - WAC 296-150F-3000, Factory-built housing and commercial structure fees. https://app.leg.wa.gov/WAC/default.aspx?cite=296-150F-3000 (fetched 2026-09-13) - Modular & Other Mobile Structures, Washington L&I. https://www.lni.wa.gov/licensing-permits/manufactured-modular-mobile-structures/modular-other-mobile-structures/ (fetched 2026-09-13) - Factory Assembled Structures Laws & Rules, Washington L&I. https://lni.wa.gov/licensing-permits/manufactured-modular-mobile-structures/laws-rules (fetched 2026-09-13) - IDAPA 24.39.31, Rules for Modular Buildings. https://dopl.idaho.gov/wp-content/uploads/2023/10/BLD-FBS-Rules.pdf (fetched 2026-09-13) - NDAC chapter 108-02-01, Third-Party Inspections Program. https://www.commerce.nd.gov/sites/www/files/documents/Community%20Services/Building%20Codes/108-02-01.pdf (fetched 2026-09-13) - Building Codes, North Dakota Commerce. https://www.commerce.nd.gov/community-services/building-codes (fetched 2026-09-13) - IIBC FAQ. https://interstateibc.org/faq/ (fetched 2026-09-13) - Plan Review, Wyoming State Fire Marshal's Office. https://wsfm.wyo.gov/fire-prevention/plan-review (fetched 2026-09-13) - Wyoming Statutes Title 35 Chapter 9 Article 1 (Department of Fire Prevention and Electrical Safety). https://law.justia.com/codes/wyoming/title-35/chapter-9/article-1/ (fetched 2026-09-13, via search result listing) --- ## 8. Inspection and enforcement in the field ### Where your responsibility ends The line is drawn in rule, and it is a clean one: > A unit bearing the insignia of approval is acceptable as meeting the requirements of Title 50, > chapter 60, MCA, throughout the state of Montana **without further inspection or fees except for > zoning, utility connections, and foundation permits** as required by the authority having > jurisdiction. (ARM 24.301.1245(1)) So: everything inside the box is yours and the Bureau's. The hole in the ground, the pipes and wires coming into the box, and where the box is allowed to sit are the local authority's. ### Who the local authority is Two cases. **Inside a certified city, county or town programme.** A local government may not enforce a building code unless the Building Codes Program has certified its programme. Currently certified: - Comprehensive: Belgrade, Billings, Bozeman, Columbia Falls, Darby, Great Falls, Hamilton, Helena, Kalispell, Manhattan, Missoula, Polson, Stevensville, Whitefish - Building only: Choteau, Conrad, Cut Bank, Forsyth, Glasgow, Havre, Lewistown, Red Lodge, Ronan, Shelby, Townsend - Residential building only: Colstrip, Deer Lodge, Hardin, Libby, Troy, West Yellowstone - Counties: Deer Lodge, Missoula, Pondera, Richland, Silver Bow, Toole Enforcement types are coded B (building), P (plumbing), E (electrical), M (mechanical), SP (swimming pool), W (wildland urban interface). In these places the local department writes the foundation permit, inspects the set and the tie-down, and runs the utility connection inspections. **Everywhere else.** All other areas are under the jurisdiction of the State Building Codes Bureau. But outside certified cities, state law **exempts** several categories from needing a state building permit at all, and one of them matters a lot to Ken: - farm and ranch buildings - mining buildings on mining property - petroleum refineries and pulp and paper mills, except office and shop buildings - **residential buildings containing less than five dwelling units**, except when serving transient guests - private garages and private storage buildings for the owner's own use, not part of a commercial enterprise So the 40x28 single-family house, set outside a certified jurisdiction, will typically need **no state building permit for the site work**, though the unit itself still needs the insignia and the site still needs whatever zoning, utility and foundation permitting the AHJ requires. The shower house is a commercial building, so the state building permit exemptions mostly do not help it. Check each site. State building permit fee, where one is required, is generally **1% to 2% of building valuation**, calculated by the Bureau, with the plan review portion billed first. On the construction side, it is the permit holder's job to call the inspector at least 24 hours before a requested inspection, and the inspector has 72 hours from notification to perform it. Building permits must be issued before plumbing, mechanical or electrical permits can issue and before work under those permits starts. ### If a unit shows up without a label ARM 24.301.1245(2) is blunt. Any new unit delivered to Montana, to a sales lot or placed on location, that does not bear an insignia is in violation of Title 50, chapter 60, MCA. The unit gets treated as an **existing building** and has to meet all requirements of the authority having jurisdiction. That means a local inspector opening up your finished work. ### Enforcement against the manufacturer ARM 24.301.1271 sets the sequence: 1. Bureau inspection finds a violation. Written **notice of violation** naming the specific statute, rule or code violated for each unit, the corrections required, the 14-day deadline, and a deadline for reporting completed corrections. 2. The Bureau posts a **prohibited sales notice** on the affected units. You may not move them until the Bureau is told the destination or disposition, and you may not remove the notice without authorisation. 3. Within 14 days you either tell the Bureau in writing you intend to correct, or request a hearing. 4. On your notice of corrections the units are reinspected and you pay the applicable fees. 5. Do neither and the Bureau may **confiscate the insignia**. Separately, Bureau inspectors may enter any premises in Montana where units are sold or offered for sale, with or without prior announcement, to check insignia (ARM 24.301.1215). ### Sources (section 8) - ARM 24.301.1245, Effect of insignia of approval. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1245 (fetched 2026-09-13) - ARM 24.301.1215, Inspection of retailer (fetched 2026-09-13) - ARM 24.301.1271, Notice of violations. https://www.law.cornell.edu/regulations/montana/ARM-24-301-1271 (fetched 2026-09-13) - 50-60-402, MCA. https://mca.legmt.gov/bills/mca/title_0500/chapter_0600/part_0040/section_0020/0500-0600-0040-0020.html (fetched 2026-09-13) - Certified City, County and Town Programs, Montana DLI. https://bsd.dli.mt.gov/building-codes-permits/certified-government (fetched 2026-09-13) - Is a State Building Permit Needed?, Montana DLI, URL as in section 5 (fetched 2026-09-13) --- ## 9. Critical path One page. Do them in this order. The arrows are real dependencies, not suggestions. ``` A. Classification call with the Bureau (is the skid shower house an FBB? which code path for the house?) | v B. Pick and contract a third-party inspection agency (must be on Montana's list, or add $20 + their application) | +-------------------------------+ | | v v C. Buy ICC/MBI 1200 and 1205 D. Engineering: design loads from ICC decided (site-specific, or the | 115 MPH / SDC D / 30 psf floor) v | E. Write the QA manual to | ICC/MBI 1205 chapter 5 | | | v | F. Submit QA manual + $20 <----------+ | v G. QA MANUAL APPROVED <=== HARD GATE. Plan review cannot be | approved until this clears. v H. Submit model plan review application (+ plans, calcs, chapter 3 items, agency named, fees) | v (30 business days to a correction notice; 60 days to answer) I. PLAN APPROVED, FBB number issued, you appear on the approved manufacturer list | v J. Third-party initial plant certification (100% inspection of at least one module, QA process verified) | v <=== FIRST POINT YOU CAN LEGALLY BUILD FOR SALE K. Build unit 1 under ongoing third-party inspection | v L. All deficiencies corrected; agency issues its label | v M. Apply for Montana insignia ($40/section) with model name, model number, serial number(s), FBB number, MT destination | v N. Affix insignia (you, the manufacturer) and ship | v <=== EARLIEST LEGAL SALE / DELIVERY O. Site: zoning, utility connections, foundation permit from the AHJ. Local dept in a certified jurisdiction, otherwise the state Bureau (and the house may be exempt from a state building permit entirely). ``` ### What blocks what | This must finish | Before this can start or finish | |---|---| | QA manual approval (G) | Plan review approval (I) | | Plan review approval (I) | Insignia can be issued for any unit of that model | | Third-party initial plant certification (J) | Ongoing production inspections and label issuance | | All deficiencies corrected (L) | The agency may issue its label | | Insignia application complete, with serial number and Montana destination (M) | Bureau issues insignia at all | | Insignia affixed (N) | The unit may be sold, offered for sale, or delivered | ### Earliest point Ken can legally sell a unit The gating event is **an insignia affixed to a specific, serial-numbered, third-party-inspected unit built to an approved plan by an approved manufacturer.** You cannot get there without, in order: an approved QA manual, an approved model plan, a contracted approved third-party agency, that agency's initial plant certification, a built unit with every deficiency closed out, and an insignia application that names the Montana destination. There is no legal short cut, no provisional label, and no way to sell a unit while the plan is in review. Note also ARM 24.301.1201(3): a buyer cannot take delivery out of state to dodge the Montana insignia. ### Three cheap things to do in week one 1. Email buildingcodes@mt.gov with the classification question about the skid shower house, and ask for the current list of reciprocal states in the same message. 2. Get quotes from three of the approved third-party agencies, including travel per visit. 3. Buy ICC/MBI 1200 and 1205 from ICC, because everything downstream is written against them. --- ## 10. Open questions and things I could not confirm 1. **Is the skid-mounted shower house a "factory-built building" at all?** Montana's definition is a factory assembled structure equipped with the necessary service connections **"but not made so as to be readily movable as a unit or units and designed to be used with a permanent foundation"** (ARM 24.301.1205(4)). A complete building on a steel skid, designed to be picked up and moved, may fall outside that. If it does, it is not obvious what it is instead: it is not a mobile home, it is not a recreational vehicle, and ARM 24.301.1207 flatly prohibits using mobile homes, manufactured homes and RVs for commercial or business occupancy. There are relocatable-looking units on the approved manufacturer list, including Public Restroom Company and Big Sky Dog Wash, so the Bureau clearly does label products in this family. **Get the answer in writing before you tool up.** This is the single biggest unknown in the whole file. 2. **What "parts" means in the fee rule.** The review fee tiers say "parts," the insignia fee says "per section," and the definitions say "unit" means "module." Confirm that a two-module house is priced as a two-part unit. 3. **Whether the Bureau still wants the old eleven-item QC manual list** now that the rule points to ICC/MBI 1205 chapter 5. The web page and the rule disagree. 4. **Published turnaround** for FBB plan review, QA manual review, and insignia issuance. Not published anywhere I could find. The 30 business day correction-notice deadline is the only hard number. 5. **Montana's current reciprocal states.** Not published. 6. **Whether a Bureau plant visit costs anything for an in-state manufacturer.** The only inspection fee lines in rule are field technical service ($45/hr) and the out-of-state on-site review. 7. **Whether the 30 psf non-site-specific snow load is usable in practice.** ARM 24.301.1221(3) sets it as the minimum for a building whose site is unknown. Much of Montana carries a materially higher ground snow load. Confirm with the Bureau whether a non-site-specific approval at 30 psf can actually be sited anywhere in the state, or whether in practice every unit needs a site-specific load statement. This determines whether Ken can build to stock or must build to order. 8. **Which IAS accreditation criteria number** covers modular / off-site inspection agencies. 9. **Wyoming.** No state modular programme found. Confirm with the Wyoming State Fire Marshal's office and with the destination county before quoting. 10. **The Idaho insignia fee.** A secondary source says $100 per insignia; IDAPA 24.39.31 does not state it. Confirm with DOPL. 11. **Whether any agency on Montana's list also holds HUD DAPIA or IPIA designation.** Not verified here. It buys nothing in the Montana FBB programme in any case. --- ## Consolidated source list All fetched 2026-09-13. **Montana programme** - Factory-Built Buildings Permits: https://bsd.dli.mt.gov/building-codes-permits/permit-applications/factory-built-buildings/ - Application for Approval of Factory Built Building (Rev. 4/23): https://bsd.dli.mt.gov/building-codes-permits/permit-applications/factory-built-buildings/FBBP_APPLICATION_ADOBE_F.pdf - Application for Factory Built Building Insignias (Rev. 7/24): https://bsd.dli.mt.gov/building-codes-permits/permit-applications/factory-built-buildings/FBBP_INSIGNIA_APP_ADOBE_F.pdf - Montana Certification Application for Third Party Inspection Agencies: https://bsd.dli.mt.gov/building-codes-permits/permit-applications/factory-built-buildings/3rdPartyInspCertApp.pdf - Approved Factory Built Building Manufacturers - Montana: https://bsd.dli.mt.gov/_docs/building-codes-permits/FBBManufacturersWeb-2026.pdf - Online Factory-Built Building Permit (Accela): https://aca-prod.accela.com/bcb/Default.aspx - Current Codes: https://bsd.dli.mt.gov/building-codes-permits/current-codes - Certified City, County and Town Programs: https://bsd.dli.mt.gov/building-codes-permits/certified-government - Is a State Building Permit Needed?: https://bsd.dli.mt.gov/building-codes-permits/permit-applications/building-permits/state-building-permit - HUD 309 Inspections: https://bsd.dli.mt.gov/building-codes-permits/hud-309-inspections **Montana rules (ARM subchapter 24.301.12, all new or transferred effective 9/21/2024, 2024 MAR p. 2223)** - 1201 Applicability: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1201 - 1203 ICC/MBI standards: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1203 - 1205 Definitions: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1205 - 1207 Commercial occupancy prohibition: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1207 - 1211 Bureau inspectors: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1211 - 1213 Third-party agency approval: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1213 - 1215 Inspection of retailer: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1215 - 1217 Manufacturer registration: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1217 - 1221 Model plan review: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1221 - 1223 QA manual: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1223 - 1225 Nonconforming plans: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1225 - 1227 Changes to reviewed plans: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1227 - 1231 Plan renewal: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1231 - 1233 Plan review revocation: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1233 - 1235 Reciprocity: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1235 - 1237 Transmission to reciprocal state: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1237 - 1241 / 1243 / 1245 / 1247 / 1249 Insignia: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1241 (and -1243, -1245, -1247, -1249) - 1261 Plan and system review fees: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1261 - 1263 Insignia fees: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1263 - 1265 Miscellaneous fees: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1265 - 1271 Notice of violations: https://www.law.cornell.edu/regulations/montana/ARM-24-301-1271 - Repealed / transferred predecessors: -558, -565, -566, -567 at the same URL pattern - Subchapter index: https://www.law.cornell.edu/regulations/montana/department-24/chapter-24.301/subchapter-24.301.12 - 50-60-402, MCA: https://mca.legmt.gov/bills/mca/title_0500/chapter_0600/part_0040/section_0020/0500-0600-0040-0020.html **Other states** - WAC 296-150F-3000 fees: https://app.leg.wa.gov/WAC/default.aspx?cite=296-150F-3000 - Washington L&I, Modular & Other Mobile Structures: https://www.lni.wa.gov/licensing-permits/manufactured-modular-mobile-structures/modular-other-mobile-structures/ - Washington L&I, FAS Laws & Rules: https://lni.wa.gov/licensing-permits/manufactured-modular-mobile-structures/laws-rules - IDAPA 24.39.31 Rules for Modular Buildings: https://dopl.idaho.gov/wp-content/uploads/2023/10/BLD-FBS-Rules.pdf - Idaho Modular Fee Table: https://dopl.idaho.gov/wp-content/uploads/2023/10/BLD-Modular-Fee-Table.pdf - NDAC 108-02-01 Third-Party Inspections Program: https://www.commerce.nd.gov/sites/www/files/documents/Community%20Services/Building%20Codes/108-02-01.pdf - North Dakota Commerce, Building Codes: https://www.commerce.nd.gov/community-services/building-codes - IIBC FAQ: https://interstateibc.org/faq/ - Wyoming State Fire Marshal, Plan Review: https://wsfm.wyo.gov/fire-prevention/plan-review - Wyoming Statutes Title 35 Ch 9 Art 1: https://law.justia.com/codes/wyoming/title-35/chapter-9/article-1/ **Standards background** - ICC/MBI 1205-2021 explainer, NEEP/MEEA: https://neep.org/sites/default/files/media-files/iccmbi_1205.pdf - IAS accreditation programs: https://portal.iasonline.org/accreditation-programs/