Cal. Food & Agric. Code § 29040

Every person that is the owner, broker, or is in possession of an apiary that is located within the state, on the first day of January of each year, shall register the number of colonies in each apiary that is owned or possessed by the person and the location of each apiary. Every person required to register under this article, shall do so on the first day of January of each year in which they maintain, possess, or are in possession of an apiary, or within 30 days thereafter, as prescribed in this article.