The Washington plane coordinate system shall be named, and in any land description in which it is used it shall be designated, the "Washington plane coordinate system," and the zone used must be specified.
RCW 58.20.140
Designation of system—Zones.
2020 c 50 s 3; 1989 c 54 s 12.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.