Cal. Sts. & Hy. Code § 31851.5
Whenever the legislative body determines that any portion of property acquired for parking places is not needed for that public use, the city may devote such property to some other public use which the legislative body finds will be of general benefit to the area comprising the district. Before making such determination the legislative body shall hold a public hearing thereon and shall give notice of such hearing published pursuant to Section 6061 of the Government Code in a newspaper circulated in the city at least 10 days before such hearing. The notice shall contain a general description of the property as to which the determination is proposed to be made and shall contain a general description of the public use to which such property is proposed to be devoted. The determination shall not be made if prior to the hour fixed for the hearing, the owners of more than one-half of the area of the lands within the district have filed with the clerk of the legislative body written objection to the proposed determination.
Ca. Sts. and High. Code § 31851.5