(a)
An assessment or lien to recover the costs of nuisance abatement measures taken by a governmental entity with regard to property that is subject to a notice of default, that is purchased at a foreclosure sale, or that is acquired through foreclosure under a mortgage or deed of trust, shall not exceed the actual and reasonable costs of nuisance abatement.(b)
A governmental entity shall not impose an assessment or lien unless the costs that constitute the assessment or lien have been adopted by the elected officials of that governmental entity at a public hearing.
Source:
Section 2929.45, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=CIV§ionNum=2929.45..