Notwithstanding Section 5391, in granting certificates to the holders of class C certificates, the commission shall require that those carriers procure and continue in effect adequate protection against liability imposed by law upon the carrier for the payment of damages for personal bodily injuries, including death resulting therefrom; protection against a total liability of the carrier of passengers on account of bodily injuries to, or death of, more than one person as a result of any one accident; and protection against damage or destruction of property. The requirement of that assurance of protection against liability shall be seven hundred fifty thousand dollars ($750,000) per accident.