Premium, appraisal, and inspection charges
The Secretary shall collect a premium charge for the insurance of mortgages under this section which shall be payable annually in advance by the mortgagee, either in cash or in debentures issued by the Secretary under any subchapter and section of this chapter, except debentures of the Mutual Mortgage Insurance Fund, or of the Cooperative Management Housing Insurance Fund at par plus accrued interest. In addition to the premium charge herein provided for the Secretary is authorized to charge and collect such amounts as he may deem reasonable for the appraisal of a property or project offered for insurance and for the inspection of such property or project during construction: Provided , That such charges for appraisal and inspection shall not aggregate more than 1 per centum of the original principal face amount of the mortgage.