A state highway to be known as state route number 543 is established as follows:
Beginning at a junction with state route number 5 in the vicinity of Blaine, thence northerly to the international boundary.
RCW 47.17.797
State route No. 543.
1971 ex.s. c 73 s 22.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.