Code of Federal Regulations > Title 40 > Chapter I > Part 57 - PART 57—PRIMARY NONFERROUS SMELTER ORDERS

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

Subpart A [§ 57.101 - § 57.111] - Subpart A—General

Subpart B [§ 57.201 - § 57.205] - Subpart B—The Application and the NSO Process

Subpart C [§ 57.301 - § 57.305] - Subpart C—Constant Controls and Related Requirements

Subpart D [§ 57.401 - § 57.405] - Subpart D—Supplementary Control System Requirements

Subpart E [§ 57.501 - § 57.505] -

Subpart F [§ 57.601 - § 57.606] - Subpart F—Research and Development Requirements

Subpart G [§ 57.701 - § 57.705] - Subpart G—Compliance Schedule Requirements

Subpart H [§ 57.801 - § 57.816] - Subpart H—Waiver of Interim Requirement for Use of Continuous Emission Reduction Technology

Appendix Appendix A - Appendix A to Part 57—Primary Nonferrous Smelter Order (NSO) Application