Except as otherwise provided by RCW 47.20.710 through 47.20.735 or by the agreement authorized by RCW 47.20.710, the department may proceed with the location, design, acquisition of right-of-way, construction, and maintenance of the highway as an agent of the governing authority for the Indian peoples of the Quinault Indian Reservation in accordance with applicable state or federal law.
RCW 47.20.730