Wash. Admin. Code § 392-143-032
The superintendent of public instruction must issue school bus operation permits as follows:
(1) School buses owned or operated by a school district or owned by a private contractor under contract to a school district must be issued a school bus operation permit on receipt of the following electronic files or documents for each new school bus or used school bus not previously issued a school bus operation permit in Washington state:
(2) A school bus operation permit must be reissued on receipt of the following electronic files or documents for school buses previously licensed in Washington state:
[Statutory Authority: RCW 46.61.380. WSR 18-09-092, § 392-143-032, filed 4/17/18, effective 5/18/18; WSR 12-15-079, § 392-143-032, filed 7/18/12, effective 8/18/12; WSR 12-01-075, § 392-143-032, filed 12/19/11, effective 1/19/12; WSR 04-08-117, § 392-143-032, filed 4/6/04, effective 5/7/04; WSR 91-23-069 (Order 22), § 392-143-032, filed 11/19/91, effective 11/19/91.]