No fuel-burning or internal-combustion engine, other than diesels as allowed in Section 7070 of these Orders, shall be permitted to operate in any mine.
Cal. Code Regs. Tit. 8, § 7069
No fuel-burning or internal-combustion engine, other than diesels as allowed in Section 7070 of these Orders, shall be permitted to operate in any mine.
Cal. Code Regs. Tit. 8, § 7069