Requires a motor vehicle excise tax imposed by a regional transit authority after July 15, 2015, to comply with chapter 82.44 RCW (motor vehicle excise tax provisions) as it existed on January 1, 1996, until December 31st of the year in which the regional transit authority repays bond debt to which the tax was pledged before July 15, 2015, only to the extent necessary to repay bond debt incurred before January 1, 2017.

Requires the tax to comply with chapter 82.44 RCW as it existed on the date the tax was approved by voters, with respect to bond debt incurred on or after January 1, 2017, and to which the tax is pledged.