Excepting as to the business of renting out boats, each applicant for a commercial permit, in addition to the charges or fees hereinbefore prescribed, shall pay to the board, at the time of filing the application for permit, as a part of the consideration for the granting thereof, a charge or fee, to be determined by the board after consideration of the permit privileges for which application is to be made. Said charge or fee shall be an annual charge, subject to revision by the board from time to time, and shall be paid to the board at the time of filing original application for commercial permit, and also at the time of filing an application for any renewal or renewals thereof. The said annual charge or fee shall be refunded in case of nonissuance of permit, renewal or renewals thereof. No refund will be made if permit or renewal is issued, excepting a pro rata refund in cases where the access area is granted for a width less than that for which application was made.