Wash. Admin. Code § 296-137-060
(1) A property services contractor shall submit at least annually, no later than January 31, 2027, and each January 31st thereafter, on a department issued physical or electronic form, the following:
(c) The physical address of the work location or locations at which janitorial services were provided in the previous calendar year by workers of the property services contractor, and for each location:
[Statutory Authority: Chapter 49.60 RCW. WSR 26-01-099, s 296-137-060, filed 12/16/25, effective 1/16/26.]