RCW 81.80.290: Rules and regulations.

The commission shall have power and authority, by general order or otherwise, to prescribe rules and regulations in conformity with this chapter to carry out the purposes thereof, applicable to any and all "motor carriers," or to any persons transporting property by motor vehicle for compensation even though they do not come within the term "motor carrier" as herein defined.

The commission shall mail each holder of a permit under this chapter a copy of such rules and regulations.