Cal. Pub. Util. Code § 1033

The commission, in the exercise of the jurisdiction conferred upon it by the Constitution of this State and by this part, may grant certificates of public convenience and necessity, make decisions and orders, and prescribe rules affecting passenger stage corporations, notwithstanding the provisions of any ordinance or permit of any city, county, or city and county, and in case of conflict between any such order or rule and any such ordinance or permit, the certificate, decision, order, or rule of the commission shall prevail.