California Code, Business and Professions Code - BPC § 12202

(a) The secretary shall cause to be examined persons desiring to become county sealers, deputy county sealers, or inspectors and shall adopt rules and regulations governing these examinations given for the purpose of determining the fitness, experience, and qualifications of candidates for these positions. The secretary may provide for inspectors qualified to be employed in designated categories. Successful candidates shall be given a license that shall be good for five years unless revoked. Licenses of incumbent county sealers, deputy county sealers, or inspectors shall be renewed upon expiration without further examination.

(b) The secretary may charge each candidate a fee to cover the actual cost of providing the license examination.