California Code, Fish and Game Code - FGC § 356

(a) Migratory game birds may be taken in conformity with federal laws and regulations and the regulations of the commission adopted pursuant to this article.

(b) In the event no regulations are prescribed by the proper federal agency, the commission may determine and fix the area or areas, the seasons and hours, the species, the bag and possession limits, and the total number that may be taken during any open season for the taking of migratory game birds, under rules and regulations adopted by the commission.  The rules and regulations shall have the same effect as if enacted by the Legislature.