When a tunnel constructed before April 7, 1953 is extensively repaired or rebuilt, an unobstructed passageway shall be provided as required in the foregoing paragraph of this subsection.
Cal. Code Regs. Tit. 8, § 7031
When a tunnel constructed before April 7, 1953 is extensively repaired or rebuilt, an unobstructed passageway shall be provided as required in the foregoing paragraph of this subsection.
Cal. Code Regs. Tit. 8, § 7031