Who enforces each one, what edition applies, and what changes next. 8 of 8 state-level topic areas checked against primary sources. OSHA state plan: IOSHA (Iowa Occupational Safety and Health Administration), DIAL Labor/IOSHA Division.
| Area | In force | Authority | Next |
|---|---|---|---|
| Fire | International Fire Code, 2024 edition with Iowa amendments, 481 IAC ch. 280 (moved from 661 IAC ch. 201 in the IAC Supplement of 11/26/25); effective Sept 10, 2025 (ARC 9472C), with a further amendment effective Jun 3, 2026 (ARC 0246D)DIAL's fire safety bureau administers fire control, collaborating with the state fire marshal division of DPS. Rule 280.8 adopts the 2024 IFC and listed 2024 IBC chapters as amended. Fire code questions go to DIAL; confirm with the AHJ. SourceChecked on the source | Iowa Dept. of Inspections, Appeals, and Licensing (DIAL) fire safety bureau, with the DPS State Fire Marshal Division; local fire officials | In forceIn force; ARC 0246D (effective Jun 3, 2026) restored subrule 280.8(2) adopting 2024 IBC chapters 2-7 and sections 804-805 (ARC text re-read Oct 21, 2026); no further change found |
| Building | 2024 IBC, IRC, IEBC with Iowa amendments, 481 IAC ch. 301 (moved from 661 IAC ch. 300-301), effective Sept 10, 2025; energy provisions kept at the 2012 IECC (residential and commercial), residential air-leakage amendment effective Aug 12, 2026 (ARC 0412D)Rule 301.3 adopts the 2024 IBC, 301.7 the 2024 IEBC and 301.8 the 2024 IRC, each amended. Energy rules keep the 2012 IECC; ARC 0412D (effective Aug 12, 2026) sets 4 air changes per hour in the simulated-performance reference design for Iowa's climate zones, matching the blower-door test. Plumbing and mechanical codes are separate. SourceChecked on the source | State building code commissioner within DIAL adopts the code (Iowa Code ch. 103A); local governmental subdivisions issue permits and inspect. Mandatory only for state-owned buildings and cities over 15,000 lacking an equivalent local code | In forceIn force; IAC Supplement 9/30/26 text re-read Oct 21, 2026, no edition change. Separately, ARC 0616D (Notice of Intended Action) would revise ch. 300 plan review fees, adding fire suppression and fire alarm tiers, and inspection fees; comments closed Oct 20, 2026; not yet adopted |
| Elevators | 481 IAC ch. 371-373 under Iowa Code ch. 89A; ch. 372 ties the ASME edition to install date: A17.1-2019/CSA B44-19 (with listed exceptions) for installations on or after June 1, 2021DIAL conveyance safety program. State inspectors inspect annually unless the director finds resources do not allow; special inspectors inspect at least annually. Construction elevators and CPHs are inspected quarterly per the rule. Rules amended effective Feb 12, 2025 (ARC 8773C). SourceChecked on the source | DIAL (Dept. of Inspections, Appeals & Licensing), Elevator Safety program, under Iowa Code ch. 89A and the Elevator Safety Board | In forceIn force; no pending edition change found as of this research |
| Boilers | National Board Inspection Code (NBIC) 2021 plus ASME Section I/IV and CSD-1; 481 IAC ch. 390 under Iowa Code ch. 89Chapter 390 (revised effective Mar 26, 2025) adopts the 2021 NBIC for inspection; certificate inspection within a 60-day window before expiration; certificate to operate must be posted; temporary-object certificates last 1 year; some objects get internal inspection every 4 years. SourceChecked on the source | DIAL (Dept. of Inspections, Appeals & Licensing), Boiler and Pressure Vessel program, under Iowa Code ch. 89 | In forceIn force; no pending edition change found as of this research |
| Pools | 481 IAC ch. 485, swimming pools, spas and spray pads (moved from DPH 641 IAC ch. 15 per IAC 2/4/26); effective Sept 24, 2025 (ARC 9498C); rescission date for review Sept 24, 2030Sets disinfectant/pH ranges (free chlorine 1-8 ppm or bromine 2-18 ppm), testing at opening and every 4 hours, certified-operator and lifeguard rules, and entrapment-prevention standards for suction outlets. SourceChecked on the source | DIAL (Dept. of Inspections, Appeals & Licensing), Swimming Pools & Spas program | In forceIn force since Sept 24, 2025; routine 5-year rule-review sunset in 2030, not a substantive change |
| Lodging | Hotel Sanitation Code, Iowa Code ch. 137C; DIAL licenses hotels statewide (or delegates to local boards of health by agreement)Iowa Code 137C: no one may open or operate a hotel before inspection and license; license expires one year from issue; annual fees $50 (30 rooms or fewer), $100 (31-100), $150 (101+). Biennial inspections repealed by 2024 Acts ch. 1077; inspection on complaint remains. SourceChecked on the source | DIAL (Dept. of Inspections, Appeals & Licensing) licenses and inspects hotels; municipal boards of health may take over by agreement if they also enforce food-safety rules | In forceIn force; the 2024 inspection-frequency amendment is already effective, no further change pending as of this research |
| Workplace | IOSHA State Plan (federally approved), Iowa Code ch. 88; DIAL Labor/IOSHA DivisionOSHA's Iowa page: state plan covers private-sector and state/local government workplaces, excluding federal employers and some maritime and other sectors. Initial approval Jul 20, 1973; final approval Jul 2, 1985. DIAL's IOSHA page cites Iowa Code ch. 88 and rules chs. 203-213. SourceChecked on the source | DIAL (Dept. of Inspections, Appeals & Licensing), Labor/IOSHA Division; federal OSHA retains jurisdiction only where the state plan does not apply | In force |
| Environmental | Federal EPA baseline (SPCC 40 CFR 112, EPCRA Tier II, HFC 40 CFR 84, engines 40 CFR 63 ZZZZ, asbestos 40 CFR 61 M, UST 40 CFR 280) plus Iowa DNR layer: UST rules 567 IAC ch. 135 (rescinded and replaced, effective Sept 23, 2026, ARC 0491D); small-engine registration (567 IAC 22.1(2)r); asbestos notification fee (567 IAC 30.3); bypass reporting (567 IAC 63.6)New ch. 135: register a new tank within 30 days of final installation inspection, notify DNR 30 days before install; tanks over 1,100 gal pay $65/tank yearly by Jan 15 ($250 late after Mar 1). New engines under 400 bhp register. Asbestos notice 10 working days ahead. Sewer bypass: phone DNR within 24 hours, written report in 5 days. SourceChecked on the source | Iowa DNR (UST, air, asbestos, wastewater); local utilities for grease, lift stations and backflow; U.S. EPA (federal). Confirm with DNR or a licensed professional. | Deadline Jan 15, 2027UST annual management fee form and $65/tank payment due Jan 15, 2027, $250 late fee after Mar 1 (567 IAC 135.3(5), ARC 0491D effective Sept 23, 2026, re-read Oct 19, 2026); Tier II filing Mar 1, 2027; HFC automatic leak detection for existing 1,500 lb+ refrigeration Jan 1, 2027 |
What our record said before and after each change, with the date and the official source. A change to the record is not by itself a change in the law: an edition, a date or a source may have been corrected or made more precise. Confirm the current text with the authority.
International Fire Code, 2024 edition with Iowa amendments, 481 IAC ch. 280 (moved from 661 IAC ch. 201 in the IAC Supplement of 11/26/25); effective Sept 10, 2025 (ARC 9472C), with a further amendment effective Jun 3, 2026 (ARC 0246D). DIAL's fire safety bureau administers fire control, collaborating with the state fire marshal division of DPS. Rule 280.8 adopts the 2024 IFC and listed 2024 IBC chapters as amended. Fire code questions go to DIAL; confirm with the AHJ. Enforced by: Iowa Dept. of Inspections, Appeals, and Licensing (DIAL) fire safety bureau, with the DPS State Fire Marshal Division; local fire officials.
2024 IBC, IRC, IEBC with Iowa amendments, 481 IAC ch. 301 (moved from 661 IAC ch. 300-301), effective Sept 10, 2025; energy provisions kept at the 2012 IECC (residential and commercial), residential air-leakage amendment effective Aug 12, 2026 (ARC 0412D). Rule 301.3 adopts the 2024 IBC, 301.7 the 2024 IEBC and 301.8 the 2024 IRC, each amended. Energy rules keep the 2012 IECC; ARC 0412D (effective Aug 12, 2026) sets 4 air changes per hour in the simulated-performance reference design for Iowa's climate zones, matching the blower-door test. Plumbing and mechanical codes are separate. Enforced by: State building code commissioner within DIAL adopts the code (Iowa Code ch. 103A); local governmental subdivisions issue permits and inspect. Mandatory only for state-owned buildings and cities over 15,000 lacking an equivalent local code.
Elevators: DIAL (Dept. of Inspections, Appeals & Licensing), Elevator Safety program, under Iowa Code ch. 89A and the Elevator Safety Board (481 IAC ch. 371-373 under Iowa Code ch. 89A; ch. 372 ties the ASME edition to install date: A17.1-2019/CSA B44-19 (with listed exceptions) for installations on or after June 1, 2021). Boilers: DIAL (Dept. of Inspections, Appeals & Licensing), Boiler and Pressure Vessel program, under Iowa Code ch. 89 (National Board Inspection Code (NBIC) 2021 plus ASME Section I/IV and CSD-1; 481 IAC ch. 390 under Iowa Code ch. 89).
Iowa runs an OSHA-approved state plan: IOSHA (Iowa Occupational Safety and Health Administration), DIAL Labor/IOSHA Division. The state agency enforces workplace safety rules for most private employers.
Environmental: Deadline Jan 15, 2027 (UST annual management fee form and $65/tank payment due Jan 15, 2027, $250 late fee after Mar 1 (567 IAC 135.3(5), ARC 0491D effective Sept 23, 2026, re-read Oc); Jan 1, 2027: Automatic leak detection on existing 1,500 lb+ HFC commercial refrigeration; Jan 15, 2027: Iowa UST annual tank management fee form and $65/tank payment for tanks over 1,100 gallons ($250 late fee if unpaid by Mar 1; delivery prohibition possible).
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