California Code, Health and Safety Code - HSC § 1797.182

All ocean, public beach, and public swimming pool lifeguards and all firefighters in this state, except those whose duties are primarily clerical or administrative, shall be trained to administer first aid and cardiopulmonary resuscitation. The training shall meet standards prescribed by the authority, and shall be satisfactorily completed by such persons as soon as practical, but in no event more than one year after the date of employment. Satisfactory completion of a refresher course which meets the standards prescribed by the authority in cardiopulmonary resuscitation and other first aid shall be required at least every three years.

The authority may designate a public agency or private nonprofit agency to provide for each county the training required by this section. The training shall be provided at no cost to the trainee.

As used in this section, “lifeguard” means any regularly employed and paid officer, employee, or member of a public aquatic safety department or marine safety agency of the State of California, a city, county, city and county, district, or other public or municipal corporation or political subdivision of this state.

As used in this section, “firefighter” means any regularly employed and paid officer, employee, or member of a fire department or fire protection or firefighting agency of the State of California, a city, county, city and county, district, or other public or municipal corporation or political subdivision of this state or member of an emergency reserve unit of a volunteer fire department or fire protection district.