California Code, Public Utilities Code - PUC § 377

The commission shall continue to regulate the facilities for the generation of electricity owned by any public utility prior to January 1, 1997, that are subject to commission regulation until the owner of those facilities has applied to the commission to dispose of those facilities and has been authorized by the commission under Section 851 to undertake that disposal.  Notwithstanding any other provision of law, no facility for the generation of electricity owned by a public utility may be disposed of prior to January 1, 2006.  The commission shall ensure that public utility generation assets remain dedicated to service for the benefit of California ratepayers.