"Horseless carriage license plate" is a special license plate that may be assigned to a vehicle that is at least forty years old.
RCW 46.04.199
Horseless carriage license plate. (Effective until January 15, 2026.)
2017 c 147 s 1; 2010 c 161 s 120.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.