No corporation subject to the provisions of this article shall amend its charter or certificate of incorporation, its bylaws, the terms or provisions of contracts executed or to be executed with dentists, or the terms or provisions of contracts issued or proposed to be issued to subscribers unless such proposed amendments have been submitted to and approved by the Department of Insurance. No change shall be made in the table of rates charged or proposed to be charged to subscribers, or in the table of payments made or proposed to be made to dentists, for any form of contract issued or to be issued until such proposed change has been submitted to and approved by the Department of Insurance. Such approval shall be deemed granted unless the department otherwise acts upon the proposed changes within 90 days of filing. Upon the adoption of any amendment or change following departmental approval, such corporation shall file with the department a copy thereof duly certified by at least two of the executive officers of the corporation.