Cal. Bus. & Prof. Code § 7042.5
This chapter does not apply to public utilities operating under the regulation of the Public Utilities Commission on construction, maintenance, and development work incidental to their own business, or to those activities of a cable television corporation subject to regulation pursuant to Section 768.5 of the Public Utilities Code, except underground trenching by a cable television corporation within the public streets, other than that necessary solely for the connection of its distribution system to, or within the properties of, subscribers or potential subscribers.
As used in this section, a cable television corporation is a corporation or person that transmits television programs by cable to subscribers for a fee.
Ca. Bus. and Prof'l. Code § 7042.5