Past due royalty payments shall bear interest at the highest rate permitted by RCW 19.52.020 per month. Costs of collection, including attorney's fees, shall be recoverable in addition to interest.
Wash. Admin. Code § 332-14-140
Statutory Authority: RCW 79.01.668. 85-10-040 (Order 443), § 332-14-140, filed 4/29/85.