What 29 CFR 1926.1201 requires (plain English)
29 CFR 1926.1201 opens Subpart AA, Confined Spaces in Construction, by setting its scope. It provides that the standard sets forth requirements for practices and procedures to protect employees engaged in construction activities at a worksite with one or more confined spaces, subject to the exceptions in paragraph (b) of the section.
OSHA added Subpart AA in 2015 to give construction a comprehensive confined-space standard, parallel to but distinct from the general-industry standard in 1910.146. Before that, construction had only a single, limited training-oriented provision. The paragraph (b) exceptions carve out work already covered by other standards (for example, excavations (Subpart P), diving operations (which have their own rules), and certain other activities) so Subpart AA does not double-regulate work addressed elsewhere.
The substantive requirements follow: 1926.1202 (definitions), 1926.1203 (general requirements, a competent person evaluates the worksite for confined and permit spaces), 1926.1204 (the permit-required confined space program), 1926.1205 (permitting), 1926.1206–1926.1211 (entry, testing, monitoring, attendants, and rescue), and 1926.1207 (training). 1926.1201's scope determines which construction work all of these apply to, making it the entry point for the confined-space protections that keep construction workers from being overcome in manholes, vaults, and tanks. (Section 1926.1200 is reserved; the operative scope is 1926.1201.)