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title 30
Mineral Resources
chapter I
CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
part 57
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
subpart A
Subpart A—General
subjgrp 141
Procedures
Subjgrp 141. Procedures
§ 57.1000 - Notification of commencement of operations and closing of mines.
