Okla. Admin. Code § 748:20-6-2
The IRC® 2018, as amended and revised by these rules, is hereby established and adopted as the statewide minimum code for residential building construction for one- and two-family dwellings and townhouses in Oklahoma pursuant to 59 O.S. § 1000.23 and may only be amended or altered by other jurisdictions pursuant to Oklahoma law.
Amended and renumbered from 748:20-5-2 at 39 Ok Reg 2364, eff 9-14-22