Cal. Education Code § 42644

Orders for the payment of wages and payroll orders for the payment of wages of employees employed full time in positions not requiring certification qualifications shall be drawn twice during each calendar month on days designated in advance by the governing board of each school district to which this section is made applicable. Labor performed between the 1st and 15th days, inclusive, of any calendar month shall be paid for between the 16th and 26th day of the month during which the labor was performed, and labor performed between the 16th and the last day inclusive, of any calendar month, shall be paid for between the 1st and 10th day of the following month. The governing board of each school district which has an average daily attendance of 5,000 or more, and the governing board of each school district with an average daily attendance of less than 5,000 in a county with a population in excess of 4,000,000 persons as determined by the 1960 federal census, shall make the provisions of this section applicable to the board, whenever a majority of the employees of the district employed full time in positions not requiring certification qualifications petition the board in writing to do so. The governing board of a school district which has an average daily attendance of less than 5,000, other than such a school district situated in a county with a population in excess of 4,000,000 persons as determined by the 1960 federal census, may, on the petition in writing of a majority of the employees of the district employed full time in positions not requiring certification qualifications, make the provisions of this section applicable to the board.