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PART 123—STATE PROGRAM REQUIREMENTS

• SUBPART A—General (§123.1 to §123.3)
• SUBPART B—State Program Submissions (§123.21 to §123.36)
• SUBPART C—Transfer of Information and Permit Review (§123.41 to §123.46)
• SUBPART D—Program Approval, Revision, and Withdrawal (§123.61 to §123.64)