RCW 19.94.507: Gasoline delivered to service stations—Invoice required.

Persons delivering gasoline to retail service stations shall supply the station with an invoice which shall include the following information: (1) The gross volume of gasoline and the net volume of gasoline at sixty degrees Fahrenheit; (2) the time and temperature of the gasoline as loaded onto the delivery truck; and (3) the time of delivery to the retail service station.