(b) The commissioner may, in his discretion, upon the application of such a person, issue a certificate of self-insurance when he is reasonably satisfied that such person is possessed and will continue to be possessed of financial ability to respond to judgments, as hereinbefore described, obtained against such person, arising out of the ownership, maintenance, use or operation of any of such person's motor vehicles.
(c) Upon due notice and hearing, the commissioner, may, in his discretion and upon reasonable grounds, cancel a certificate of self-insurance.