Every portable telescoping derrick or mast shall be equipped with a safety device designed to engage automatically to prevent the upper section of the derrick or mast descending at an uncontrolled rate of speed if the lifting mechanism fails when the upper telescoping section is being raised or lowered.
Cal. Code Regs. Tit. 8, § 6582
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.