Section 7964.

Cal. Labor Code - LAB § 7964.
in effect
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Whenever an access shaft is used as the normal means of entrance or exit to an underground mine or tunnel, it shall be constructed of fireproof material or fireproofed by chemical or other means.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026

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