RCW 46.37.690: Electric-assisted bicycles—Label—Compliance with equipment and manufacturing requirements—No tampering unless label is replaced—Bicycle and bicycle rider provisions apply.

(1) A manufacturer or distributor of new electric-assisted bicycles, where electric-assisted bicycles are defined in RCW 46.04.169, offered for sale or distribution in Washington state must:

(a) Beginning July 1, 2018, permanently affix, in a prominent location, a label printed in arial font and at least nine-point type that contains the classification number, top assisted speed, and motor wattage;

(b) Comply with the equipment and manufacturing requirements for bicycles adopted by the United States consumer product safety commission.

(2) A person shall not tamper with or modify an electric-assisted bicycle, as defined in RCW 46.04.169, so as to change the speed capability of the electric-assisted bicycle, unless the label in subsection (1)(a) of this section is appropriately replaced.

(3) Except as otherwise provided, an electric-assisted bicycle or a rider of an electric-assisted bicycle is subject to the same provisions of this title as a bicycle or the rider of a bicycle.