"Washington state aviation license plates" means special license plates issued under RCW 46.18.200 that display images of a Stearman biplane and Mount Rainier.
RCW 46.04.6910
Washington state aviation license plates.
2017 c 11 s 5.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.