Cal. Rev. & Tax. Code § 3695.4
In addition to the provisions in Section 3695 relative to objections to sales, the state or city or any taxing agency or revenue district may file with the county tax collector written objection to the sale of, along with an application to purchase in accordance with Chapter 8 (commencing with Section 3771), any property that is or may be needed for public use. The written objection shall specify the description of the property needed, whether the fee or an easement is required, and the public purpose to which the property is intended to be devoted.
The objection and application shall be filed with the tax collector before the date of the first publication of the notice of intended sale pursuant to Sections 3702 and 3703. If the state, a city, taxing agency, or revenue district files an objection and application in compliance with this section, the tax collector may not proceed with the sale of the subject property.
Ca. Rev. and Tax. Code § 3695.4