ELR Citation: ELR 20388
No(s). 73-1552 (6th Cir. Apr 18, 1974)

In a suit brought under §307 (b)(1) of the Clean Air Act, the 6th Circuit Court of Appeals vacates an amendment by EPA to the Michigan implementation plan since the change constitutes a "revision" rather than a "clarification," and EPA has not complied with the informal rulemaking requirements of t...