Washington Revised Code Title 28A. Common School Provisions § 28A.160.020. Authorization for private school students to ride buses--Conditions

(1) The board of directors shall not be required to alter those bus routes or stops established for transporting public school students;

(2) Private school students shall be allowed to ride on a seat-available basis only; and

(3) The board of directors shall charge an amount sufficient to reimburse the district for the actual per seat cost of providing such transportation.