Cal. Rev. & Tax. Code § 673
The State Board of Equalization may issue a temporary certificate to a person who is newly employed by the state, any county, city and county, or appraisal commission in order to afford the person the opportunity to apply for and take an examination the successful passage of which would qualify the person for an appraiser' s certificate. A temporary certificate shall not be issued to exceed one year's duration and shall be issued only to a person who has demonstrated eligibility to take a civil service examination pursuant to subdivision (c) of Section 670, or who is found by the board to possess qualifications by reason of education and experience so that he or she may be reasonably expected to be competent to perform the work of an appraiser, or who has been duly elected or appointed to the office of assessor. A temporary certificate shall not be renewed.
Ca. Rev. and Tax. Code § 673