Where employees are paid on a commission or piecework basis, wholly or partially,
(1) The amount earned on such basis in each work-week period may be credited as a part of the total wage for that period; and
(2) The total wages paid for such period shall be computed on the hours worked in that period resulting in no less than the applicable minimum wage rate.
Wash. Admin. Code § 296-126-021
Order 74-9, § 296-126-021, filed 3/13/74, effective 4/15/74.