If an applicant for a license has submitted, in good faith, evidence of completion of continuing education which he had reason to believe would qualify him for license renewal, but the commissioner finds that the evidence submitted does not qualify under standards adopted pursuant to this article, the commissioner may, nonetheless, extend the license for 90 days in order to allow the applicant to submit additional evidence of compliance, which satisfies the requirements of this article. When the license is issued during or at the end of the grace period provided for in this section it shall expire four years from the date otherwise applicable if no grace period had been granted.