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(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.
(b) The abbreviations G-1, G-2, and G-3 indicate Group 1, Group 2, and Group 3, respectively. Where one or more of these abbreviations precedes a specific order it means that the order applies to the group or groups of derricks indicated by the abbreviation.
(c) Where none of these abbreviations precedes an order, it means that the order applies to all three groups of derricks.
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).
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