Cal. Pub. Util. Code § 1032.5

The commission shall issue a certificate pursuant to this article to every passenger stage corporation which conducts intrastate passenger transportation service pursuant to federal operating authority, to the extent that regulation of these operations is not preempted by the federal Bus Regulatory Reform Act of 1982 (P.L. 97-261), as amended. The commission may attach any conditions or limitations to the issuance of the certificate which it may specify, consistent with federal law and regulation.