30 CFR § 57.23001 - Definitions.
---
identifier: "/us/cfr/t30/s57.23001"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "30 CFR § 57.23001 - Definitions."
title_number: 30
title_name: "Mineral Resources"
section_number: "57.23001"
section_name: "Definitions."
chapter_name: "MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR"
subchapter_number: "K"
subchapter_name: "METAL AND NONMETAL MINE SAFETY AND HEALTH"
part_number: "57"
part_name: "SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "30 U.S.C. 811."
regulatory_source: "50 FR 4082, Jan. 29, 1985, unless otherwise noted."
cfr_part: "57"
---
# 57.23001 Definitions.
The following definitions apply in this subpart—
*Responsible person* means a person with authority and responsibility to evaluate and update a written safety program for surface mobile equipment.
*Surface mobile equipment* means wheeled, skid-mounted, track-mounted, or rail-mounted equipment capable of moving or being moved, and any powered equipment that transports people, equipment, or materials, excluding belt conveyors, at surface areas of underground metal and nonmetal mines.