Cal. Penal Code § 245.1

As used in Sections 148.2, 241, 243, 244.5, and 245, “fireman” or “firefighter” includes any person who is an officer, employee or member of a fire department or fire protection or firefighting agency of the federal government, the State of California, a city, county, city and county, district, or other public or municipal corporation or political subdivision of this state, whether this person is a volunteer or partly paid or fully paid.As used in Section 148.2, “emergency rescue personnel” means any person who is an officer, employee or member of a fire department or fire protection or firefighting agency of the federal government, the State of California, a city, county, city and county, district, or other public or municipal corporation or political subdivision of this state, whether this person is a volunteer or partly paid or fully paid, while he or she is actually engaged in the on-the-site rescue of persons or property during an emergency as defined by subdivision (c) of Section 148.3.