"Cargo extension" means a device that connects to the left and right side of a motor home or travel trailer frame and (1) becomes part of the frame, (2) does not pivot on a hitch, and (3) has an axle with two wheels, acting as a tag axle, to safely carry the weight of the cargo.
RCW 46.04.094
Cargo extension.
2016 c 22 s 3.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.