1. The professional license issued to every professional engineer in Missouri, including certificates of authority issued to corporations as hereinafter provided, shall be renewed on or before the license renewal date, provided that the required fee is paid. The board may establish, by rule, continuing education requirements as a condition to renewing the license of a professional engineer, provided that the board shall not require more professional development hours than that which is recommended by the National Council of Examiners for Engineering and Surveying or its successor organization, but not to exceed thirty such hours. The license of any professional engineer or the certificate of authority of any such corporation which is not renewed by the certificate renewal date shall expire on the renewal date and be void and the holder of the expired license or certificate shall have no rights or privileges under such license or certificate; but any person or corporation whose license or certificate has expired as aforesaid may within three months of the certificate renewal date or at the discretion of the board, upon payment of the required fee, be renewed, relicensed, or reauthorized under such person’s or such corporation’s original license number.

2. Each application for the renewal of a license or of a certificate of authority shall be on a form furnished to the applicant and shall be accompanied by the required fee; but no renewal fee need be paid by any professional engineer over the age of seventy-five.