(1) Except as provided in subsection (2) of this section, the responsibility for compliance with RCW 42.17A.320 through 42.17A.335 shall be with the sponsor of the political advertising and not with the broadcasting station or other medium.

(2) If a broadcasting station or other medium changes the content of a political advertisement, the station or medium shall be responsible for any failure of the advertisement to comply with RCW 42.17A.320 through 42.17A.335 that results from that change.