California Code, Education Code - EDC § 87413

Except as otherwise provided in Sections 87415 to 87424, inclusive, every contract or regular employee employed before July 1, 1947, shall be deemed to have been employed on the date upon which he or she first accepted employment in a probationary position.

In case two or more employees accepted employment on the same date, the governing board of the district shall determine the order of employment by lots drawn by the employees concerned or assigned at random by an independent auditing firm employed in accordance with Section 87414.