Any salary increase or decrease established by the commission pursuant to this chapter shall be subject to referendum petition by the voters of the city, in the same manner as a city ordinance, upon filing of a referendum petition with the city clerk-treasurer within 30 days after filing of a salary schedule by the commission. In the event of the filing of a valid referendum petition, the salary increase or decrease shall not go into effect until approved by a vote of the people. Referendum measures under this section shall be submitted to the voters of the city at the next following general or municipal election occurring 30 days or more after the petition is filed, and shall otherwise be governed by the provisions of the State Constitution and the laws generally applicable to referendum measures. (Ord. 1084-14 § 7).