This document, in two volumes, is a compilation of Federal regulations which directly or indirectly relate to the OCS mineral resource program responsibilities of the Department of the Interior. Source documents used for this compilation were the Code of Federal Regulations and the 'Federal Register.' Forty-nine regulations (CFR Parts), as amended, are included. Preambles to regulations, as published in the 'Federal Register, ' have been included on a selective basis. Twenty-four preambles are included. References to amending regulations, as published in the 'Federal Register, ' are included in the introductory paragraph preceding each regulation and at the end of each section. All amendments through December 31, 1980, have been included and referenced.