As part of any application for a permit, applicants shall submit, as a minimum, the information required for commercial site plan approval, as set forth herein at Section VIII, as may be amended. Applicants shall also describe the capacity of the tower, including the number and types of antennas that it can accommodate and the basis for the calculation of capacity, and any accessory structures. All calculations shall be certified by, and bear the stamp or seal of, a professional engineer licensed in Massachusetts.