29 CFR 1926 - OSHA Construction. Subpart AA - Confined Spaces in Construction. Data is current as of September 1, 2020. For future updates please install our OSHA Construction App: Contents: §1926. 1200 - [Reserved]. §1926. 1201 - Scope. §1926. 1202 - Definitions. §1926. 1203 - General requirements. §1926. 1204 - Permit-required confined space program. §1926.