(b) An application for a license shall be valid for a period of time specified by regulation of the commissioner not to exceed five years. A learner's permit shall be valid from its issuance until the expiration of the application for a driver's license for which it was issued. Provided, however, a commercial learner's permit shall be valid for no more than such time as permitted by section 308 of title 49 of the United States code and part 383.25 of title 49 of the code of federal regulations. Provided, however, that a commercial learner's permit issued by the commissioner in connection with an application for a commercial driver's license shall be cancelled within sixty days of the holder's medical certification status becoming "not-certified" based upon:
(i) the expiration of the holder's medical certification or medical variance documentation required by the federal motor carrier safety improvement act of 1999 and Part 383.71(h) of title 49 of the code of federal regulations; (ii) the holder's failure to submit such medical certification or medical variance documentation at such intervals as required by the federal motor carrier safety improvement act of 1999 and Part 383.71(h) of title 49 of the code of federal regulations and in a manner prescribed by the commissioner; or (iii) the receipt by the commissioner of information from the issuing medical examiner or the federal motor carrier safety administration that a medical certification or medical variance was issued in error or rescinded. The commissioner shall, upon a holder's status becoming "not-certified", notify the holder of such commercial learner's permit issued in connection with a commercial driver's license application by first class mail to the address of such person on file with the department or at the current address provided by the United States postal service of his or her "not-certified" medical certification status and that the commercial motor vehicle privileges of such commercial learner's permit will be cancelled unless he or she submits a current medical certificate and/or medical variance in accordance with Part 383.71(h) of title 49 of the code of federal regulations or changes his or her self-certification to driving only in excepted or intrastate commerce in accordance with Part 383.71(b) (1) (ii), (iii) or (iv) of title 49 of the code of federal regulations.