Labor Code - LAB
DIVISION 5. SAFETY IN EMPLOYMENT [6300 - 9254]
( Division 5 enacted by Stats. 1937, Ch. 90. ) PART 4. MINING INDUSTRIES [7500 - 7501]
( Part 4 enacted by Stats. 1937, Ch. 90. ) CHAPTER 3. Underground Telephones [7500 - 7501]
( Chapter 3 enacted by Stats. 1937, Ch. 90. ) 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.)