U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 57Subpart A - Subpart A—General
§ 57.101 - Purpose and scope.
§ 57.102 - Eligibility.
§ 57.103 - Definitions.
§ 57.104 - Amendment of the NSO.
§ 57.105 - Submittal of required plans, proposals, and reports.
§ 57.106 - Expiration date.
§ 57.107 - The State or local agency's transmittal to EPA.
§ 57.108 - Comparable existing SIP provisions.
§ 57.109 - Maintenance of pay.
§ 57.110 - Reimbursement of State or local agency.
§ 57.111 - Severability of provisions.
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