Wash. Admin. Code § 296-96-02558
When working platform inspection operation is provided, according to ASME A17.1/CSA B44, 2.7.5.3.6 in hoistways containing a single elevator:
[Statutory Authority: Chapter 70.87 RCW. WSR 18-18-070, § 296-96-02558, filed 8/31/18, effective 10/1/18; WSR 13-24-066, § 296-96-02558, filed 11/27/13, effective 1/1/14.]