After the final passage of a resettlement franchise, it shall be referred and submitted to the vote of the electors of the city or city and county at the general or special election next ensuing not less than 20 days after the final passage of the ordinance, or if no general or special election is to be held in the city or city and county within a period of not less than 20 days and not more than 90 days after such final passage, the governing or legislative body may call a special election to submit the ordinance to the electors, the special election to be held not less than 30 days and not more than 60 days after such final passage.