Gov. Code, § 53350

(a) For purposes of financing of, or contributing to the financing of, specified public facilities, the legislative body may by resolution designate a portion or portions of the district as one or more improvement areas. An area shall be known as “Improvement Area No. ____” of “Community Facilities District ____.” After the designation of an improvement area, all proceedings for purposes of a bond election and for the purpose of levying special taxes for payment of the bonds, or for any other change pursuant to Article 3 (commencing with Section 53330), shall apply only to the improvement area for those specified facilities.

(b) In connection with the annexation by unanimous approval to a community facilities district of a parcel that was included in territory proposed for annexation in the future to the community facilities district, as described in Section 53329.6, the local agency may designate a parcel or parcels as an improvement area within the community facilities district. The designation of a parcel or parcels as an improvement area shall be specified and approved by the unanimous approval of the owner or owners of each parcel or parcels at the time that the parcel or parcels are annexed to the community facilities district. No additional hearings or procedures are required. After the designation of a parcel or parcels as an improvement area, all proceedings for approval of the appropriations limit, the rate and method of apportionment and manner of collection of special taxes, and the authorization to incur bonded indebtedness for the parcel or parcels shall apply only to the improvement area.