Regulations last checked for updates: Jan 18, 2025

Title 40 - Protection of Environment last revised: Dec 30, 2025

INTRODUCTION
STATE PLAN REQUIREMENTS
APPLICABILITY OF STATE PLANS TO AFFECTED EGUS
RECORDKEEPING AND REPORTING REQUIREMENTS
DEFINITIONS
authority: 42 U.S.C. 7401
source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.