California Code, Public Utilities Code - PUC § 728.3

(a) No telephone corporation operating within a service area shall remove any public telephone unless it has posted on the public telephone for not less than 30 days a notice, in a manner and form approved by the commission, indicating that the public telephone is to be removed and containing the appropriate telephone number of the commission which a customer may call for further information.

(b) This section shall not apply when a public telephone is removed for public safety or public nuisance purposes or at the request of the owner or lessee of the property on which the public telephone is located.