Cal. Code Regs. tit. 8, § 6558
(a) Derricks to which the orders in this article apply are classified into three groups, as follows:
Group 1 consists of derricks constructed before March 1, 1924.
Group 2 consists of derricks constructed after March 1, 1924, and before June 13, 1952.
Group 3 consists of derricks constructed after June 13, 1952.
Note: A dismantled derrick re-erected after June 13, 1952, shall be considered a new installation and governed by the orders designated as Group 3.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. New Note filed 5-8-95; operative 6-7-95 (Register 95, No. 19).