Regulations last checked for updates: Nov 22, 2024

Title 40 - Protection of Environment last revised: Nov 20, 2024
§ 257.4 - Effective date.

These criteria become effective October 15, 1979.

authority: 42 U.S.C. 6907(a)(3), 6912(a)(1), 6927, 6944, 6945(a) and (d); 33 U.S.C. 1345(d) and (e)
source: 44 FR 53460, Sept. 13, 1979, unless otherwise noted.
cite as: 40 CFR 257.4