Cal. Pub. Util. Code § 5413

Every charter-party carrier of passengers and every officer, director, agent, or employee of any charter-party carrier of passengers who violates or who fails to comply with, or who procures, aids, or abets, any violation by any charter-party carrier of passengers of any provision of this chapter, or who fails to obey, observe, or comply with any order, decision, rule, regulation, direction, demand, or requirement of the commission, or of any operating permit or certificate issued to any charter-party carrier of passengers, or who procures, aids, or abets any charter-party carrier of passengers in its failure to obey, observe, or comply with any such order, decision, rule, regulation, direction, demand, requirement, or operating permit, or certificate, is subject to a penalty of not more than two thousand dollars ($2,000) for each offense.