In the administration of this section, the Secretary shall establish a premium charge for insurance that will be sufficient to cover the full costs of the mortgage insurance program under this section, except that such charge may not exceed 3 percent per annum of the principal amount of the mortgage outstanding at any time. Not later than September 30, 1984, the Secretary shall determine and report to the Congress on the feasibility of eliminating any excess amount of the premium under this section over the premium under section
1709 of this title. In the event such premiums are not sufficient to cover the full costs of the mortgage insurance program under this section, the Secretary shall make recommendations to the Congress about changes to the program.