Wash. Admin. Code § 308-93-078
May a vessel be operated on the waters of this state if it is not registered? An unregistered vessel may be operated on the waters of this state for fifteen consecutive days from the date of purchase using the notarized bill of sale in lieu of a registration certificate. The notarized bill of sale shall be carried on the vessel and contain:
[Statutory Authority: RCW 88.02.070 and 88.02.100. WSR 01-08-021, § 308-93-078, filed 3/27/01, effective 4/27/01; WSR 98-16-030, § 308-93-078, filed 7/29/98, effective 8/29/98. Statutory Authority: RCW 88.02.030, 88.02.070, 88.02.120, 88.02.130, 88.02.140, 88.02.150 and 88.02.100. WSR 86-10-068 (Order TL/RG 25), § 308-93-078, filed 5/7/86.]