California Code, Education Code - EDC § 45277

Appointments may be made from other than the first three ranks of applicants on the eligibility list when the ability to speak, read, or write a language in addition to English or possession of a valid driver's license is a requirement of the position to be filled.  The recruitment bulletin announcing the examination shall indicate the special requirements which may be necessary for filling one or more of the positions in the class.  Where such a position is to be filled, using the authority of this section, the appointment shall be made from among the highest three ranks of applicants on the appropriate eligibility list who meet the special requirements and who are ready and willing to accept the position.

If there are insufficient applicants who meet the special requirements, an employee who meets the special requirements may receive provisional appointments which may accumulate to a total of 90 working days.  Successive provisional appointments of 90 working days or less each may be made in the absence of an appropriate eligibility list containing applicants who meet the special requirements if the personnel commission finds that the requirements of subdivisions (a) and (b) of Section 45288 have been met.  These appointments may continue for the period of the provisional appointment, but may not be additionally extended if certification can later be made from an appropriate eligibility list.