Cal. Health & Safety Code § 13962

(a) Upon receipt of a petition proposing an employee relations system for employees of the district, signed by at least 10 percent of the registered voters of the district, the district board shall either adopt an ordinance providing for the employee relations system, or adopt an ordinance subject to the approval of the voters of the district.
(b) District employees may circulate the petitions described in subdivision (a) at any time when they are not on duty.
(c) If the question is submitted to the voters at a general district election, the notice required by Section 12112 of the Elections Code shall contain a statement of the question to appear on the ballot. If the question is submitted to the voters at a special election, the notice of election and ballot shall contain a statement of the question.
(d) The question placed before the voters shall call for a “Yes” or “No” vote and shall be in substantially the following form:
“Shall the ordinance of the Board of Directors of the ______ (name of the district), adopting an employee relations system for the employees of the district, be approved?”
(e) If a majority of the voters voting on the question approve of the question, the ordinance shall go into effect.