40 CFR 51.919 - Applicability.

Regulations last checked for updates: May 01, 2025

Title 40 - Protection of Environment last revised: Nov 01, 2025

View all text of Subpart X [§ 51.900 - § 51.919]

§ 51.919 - Applicability.

As of April 6, 2015, the provisions of subpart AA shall replace the provisions of subpart X, §§ 51.900 to 51.918, which will cease to apply, with the exception of the attainment date extension provisions of § 51.907 for the anti-backsliding purposes of § 51.1105(d)(2).

[80 FR 12312, Mar. 6, 2015]

authority: 23 U.S.C. 101; 42 U.S.C. 7401-7671q.

source: 36 FR 22398, Nov. 25, 1971, unless otherwise noted.

cite as: 40 CFR 51.919