Labor Code § 7500
‹ § 7384§ 7501 ›Open in browserleginfo ↗7500.
In all mines operated in the State where a depth of more than five hundred feet underground has been reached, a telephone system shall be established, equipped and maintained by the owners or lessees of the mine with stations at each working level below the depth aforesaid, communicating with a station on the surface of the mine.
(Enacted by Stats. 1937, Ch. 90.)