Wash. Admin. Code § 314-02-061
A spirits, beer, and wine restaurant licensee with a caterer's endorsement, a beer and/or wine restaurant licensee with a caterer's endorsement, or a tavern licensee with a caterer's endorsement, may store its alcohol at locations described in RCW 66.24.320, 66.24.330, and 66.24.420 that are not on the licensed premises if the following conditions are met:
(3) If the location is one for which the licensee has an on-going contract or agreement to provide liquor service at catered events, the contract or agreement must include the following:
[Statutory Authority: RCW 66.24.010, 66.24.035, and 66.24.330. WSR 18-04-116, § 314-02-061, filed 2/7/18, effective 3/10/18. Statutory Authority: RCW 66.08.030. WSR 09-02-012, § 314-02-061, filed 12/29/08, effective 1/29/09.]