California Code, Fish and Game Code - FGC § 4370

(a) In every area in which deer may lawfully be taken during the general open season there is an archery season for the taking of deer with bow and arrow. The season for each area shall be as the commission may prescribe, with a minimum interposing interval of three days immediately preceding the regular open season on deer in that area.Except as provided in subdivision (b), a person taking or attempting to take deer during such archery season shall neither carry, nor have under his or her immediate control, any firearm of any kind.

(b) A peace officer listed in Chapter 4.5 (commencing with Section 830) of Title 3 of Part 2 of the Penal Code, whether active or honorably retired, may carry a firearm capable of being concealed on his or her person while engaged in the taking of deer with bow and arrow in accordance with subdivision (a), but shall not take or attempt to take deer with the firearm.