Fees in connection with certificates

Every air carrier, upon filing with the Commission an application for a certificate, shall deposit with the Commission as a filing fee the sum of $100, and for the transfer of such certificate the sum of $100, and for the issuance of a duplicate certificate the sum of $5; provided, however, that an applicant for a certificate in lieu of an existing certificate, as provided by law, shall not be required to pay the fees prescribed in this section.