Authorizes taxes approved by regional transit authority voters on or after January 1, 2015, to be nullified within the complete boundaries of a city or county within a regional transit authority if: (1) A majority of the city or county legislative authority votes to nullify the taxes; or

(2) A proposition to nullify the taxes is approved by voters.

Prohibits the nullified regional transit authority taxes from being imposed within the boundaries of the affected city or county.