You must only lift personnel on platforms with cranes or derricks if it is the only possible way to accomplish the work that needs to be done. See WAC 296-155-547.
Wash. Admin. Code § 296-155-553
Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, 49.17.440, 49.17.060, and 29 C.F.R. 1926, Subpart CC. 12-01-086, § 296-155-553, filed 12/20/11, effective 2/1/12.