California Code, Education Code - EDC § 87606

(a) An employment contract shall contain the terms and conditions that the governing board of the district and the proposed employee agree to and that are consistent with the law.

(b) A faculty member may be deemed to have completed the second, third, or fourth contract year, as appropriate, if the faculty member provides service for a percentage of the academic year as is required in an agreement between the governing board of the district and the exclusive bargaining representative of the faculty member.  Time spent on paid or unpaid leave of absence may be included in computing service if the faculty member serves sufficient time during the year to allow for the evaluation of the faculty member as required by any negotiated evaluation procedure.  For purposes of this subdivision, the paid or unpaid leave of absence may include, but is not limited to, any of the following: