Every contract between a local education agency and a charter bus carrier or excursion carrier, or subcontracted carrier shall require a carrier profile report indicating a satisfactory rating from the Washington utilities and transportation commission before any service is provided. Supervision of children on trips under this subsection shall be designated to a specific employee of the local education agency who shall ensure that the driver shall have not have unsupervised access to students during the trip.
Wash. Admin. Code § 392-144-045