Holders of state franchises shall comply with the Emergency Alert System requirements of the Federal Communications Commission in order that emergency messages may be distributed over the holder’s network. Any provision in a locally issued franchise authorizing local entities to provide local emergency notifications shall remain in effect, and shall apply to all holders of a state-issued franchise in the same local area, for the duration of the locally issued franchise, until the term of the franchise would have expired were the franchise not terminated pursuant to subdivision (o) of Section 5840, or until January 1, 2009, whichever is later.