No license shall remain in effect unless valid proof of financial responsibility is maintained on file with the Commission. Upon receipt of notice of termination of such financial responsibility, the Commission shall notify the concerned licensee by certified U.S. mail or other method reasonably calculated to provide actual notice, at its last known address, that the Commission shall, without hearing or other proceeding, revoke the license as of the termination date of the financial responsibility, unless the licensee shall have submitted valid replacement proof of financial responsibility before such termination date. Replacement financial responsibility must bear an effective date no later than the termination date of the expiring financial responsibility.