Wash. Admin. Code § 230-06-109
Operators may purchase merchandise prizes from a licensed or unlicensed distributor or business. The sales invoice or receipt must include at least the following information:
[Statutory Authority: RCW 9.46.070. WSR 08-21-087 (Order 633), § 230-06-109, filed 10/14/08, effective 1/1/09.]