Regulations last checked for updates: May 13, 2024

Title 40 - Protection of Environment last revised: May 09, 2024
§ 51.1119 - Applicability.

As of revocation of the 1997 ozone NAAQS on April 6, 2015, as set forth in § 50.10(c), the provisions of subpart AA shall replace the provisions of subpart X, §§ 51.900 to 51.918, which cease to apply except for § 51.907 for the anti-backsliding purposes of § 51.1105(c)(2). See subpart X § 51.919.

[80 FR 12314, Mar. 6, 2015]
source: 36 FR 22398, Nov. 25, 1971, unless otherwise noted.
cite as: 40 CFR 51.1119