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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 T
Subpart T—Safety Standards for Methane in Metal and Nonmetal Mines
subjgrp 204
Mine Categorization
Subjgrp 204. Mine Categorization
§ 57.22003 - Mine category or subcategory.
§ 57.22004 - Category placement or change in placement.
§ 57.22005 - Notice and appeal of placement or change in placement.
