Regulations last checked for updates: Feb 12, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026
§ 142.21 - State consideration of a variance or exemption request.

A State with primary enforcement responsibility shall act on any variance or exemption request submitted to it, within 90 days of receipt of the request.

source: 41 FR 2918, Jan. 20, 1976, unless otherwise noted.
cite as: 40 CFR 142.21