Costs of acquisition of approved transportation equipment purchased prior to September 1, 1982, shall be reimbursed up to one hundred percent of the cost to be reimbursed over the anticipated life of the vehicle, as determined by the state superintendent: PROVIDED, That commencing with the 1980-81 school year, reimbursement shall be at one hundred percent or as close thereto as reasonably possible: PROVIDED FURTHER, That reimbursements for the acquisition of approved transportation equipment received by school districts shall be placed in the transportation vehicle fund for the current or future purchase of approved transportation equipment and for major transportation equipment repairs consistent with rules and regulations authorized in RCW
28A.160.130.