California Code, Government Code - GOV § 19080.3

Limited term appointments shall be made only for temporary staffing needs and shall not individually or consecutively exceed one year, provided that the board may authorize limited term appointments of up to a total of two years' duration when a permanent appointment would be likely to cause a layoff, demotion, or mandatory transfer requiring a change of residence upon the conclusion of the temporary staffing need.  Limited term appointments may be extended within the time limits prescribed by this section without making an additional appointment.