Wash. Rev. Code § 19.94.460
(2) Unless such fuel is delivered to the purchaser in package form, each delivery of such fuel in an amount greater than ten gallons in the case of sale by liquid measure or one hundred pounds in the case of sale by weight must be accompanied by a delivery ticket or a written statement on which, in ink or other indelible substance, there shall be clearly and legibly stated:
[ 1992 c 237 s 29; 1969 c 67 s 46.]