Cal. Education Code § 44885.5

(a) Any school district shall classify as a probationary employee of the district any person who is employed as a district intern pursuant to Section 44830.3 and any person who has completed service in the district as a district intern pursuant to subdivision (b) of Section 44325 and Section 44830.3 and is reelected for the next succeeding school year to a position requiring certification qualifications. The governing board may dismiss or suspend employees classified as probationary employees pursuant to this subdivision in accordance with the procedures specified in Section 44948 or 44948.3 as applicable. (b) Every certificated employee, who has completed service as a district intern pursuant to subdivision (b) of Section 44325 and pursuant to Section 44830.3 and who is further reelected and employed during the succeeding school year as described in subdivision (a) shall, upon reelection for the next succeeding school year, to a position requiring certification qualifications, be classified as and become a permanent employee of the district. The governing board shall notify the employee, on or before March 15 of the employee’s last complete consecutive school year of probationary employment in a position requiring certification qualification as described in this subdivision, of the decision to reelect or not reelect the employee for the next succeeding school year to this type of a position. In the event the governing board does not give notice pursuant to this section on or before March 15, the employee shall be deemed reelected for the next succeeding school year.