RCW 58.20.160Tracts in more than one zone.When any tract of land to be defined by a single description extends from one coordinate zone into other zones, the positions of all points on its boundaries must be referred to only one of the zones, the zone which is used being specifically named in the description along with the metadata of the observations.[ 2020 c 50 s 5; 1989 c 54 s 14.]
Washington Legal Code