California Code, Education Code - EDC § 45285

(a) When all of the positions in a class are reclassified to a higher class, the incumbents of the positions who have been in the class for two or more years may be reclassified with their positions by the personnel commission. When a portion of the positions within a class are reclassified to a higher class, an incumbent who has a continuous employment record of two or more years in one or more of the positions being reclassified may be reclassified with his or her position as provided by personnel commission rule.

(b) The basis for reclassification of the position shall be a gradual accretion of duties and not a sudden change occasioned by a reorganization or the assignment of completely new duties and responsibilities. Determinations as to gradual accretion shall be on the basis of guidelines provided by personnel commission rules.

(c) An employee who has been reclassified with his or her position is ineligible for subsequent reclassification with his or her position for a period of at least two years from the initial action.