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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
All Titles
Title 23
Chapter I
Part 635
Subpart D - Subpart D—General Material Requirements
§ 635.401 - Purpose.
§ 635.403 - Definitions.
§ 635.405 - Applicability.
§ 635.407 - Use of materials made available by a public agency.
§ 635.409 - Restrictions upon materials.
§ 635.410 - Buy America requirements.
§ 635.411 - Culvert and storm sewer material types.
§ 635.413 - Guaranty and warranty clauses.
§ 635.417 - Convict produced materials.
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