Cal. Rev. & Tax. Code § 480.8
(a)
(1) For purposes of complying with the change in ownership provisions of Section 65.1 and subdivision (i) of Section 61, upon a written request of the county assessor, the owners of a cooperative housing corporation, community apartment project, condominium, planned unit development, or other residential subdivision complex with common areas or facilities in which units or lots are transferred without the use of recorded deeds, shall file an ownership report on or before the first February 1 that follows an assessor request, and on or before each February 1 thereafter. The ownership report shall include all of the following information:
(b)