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Code of Federal Regulations
C.F.R. Title 40—Protection of Environment
CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER C—AIR PROGRAMS
PART 67—EPA APPROVAL OF STATE NONCOMPLIANCE PENALTY PROGRAM
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Subpart C—Federal Notice of Noncompliance to Sources in States With Approved Programs
§67.21 Federal notice of noncompliance to owners or operators of sources in States with approved programs.
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