The Secretary or the Administrator of the Maritime Administration is authorized to advance to the Federal Ship Financing Fund from the Vessel operations revolving fund (46 U.S.C. 1241a),^[1] such amounts as may be required for the payment, pursuant to section 1275 of this Appendix, of unpaid principal amounts of defaulted mortgages and loans and of unpaid interest thereon: Provided, That such advances shall be repaid to the Vessel operations revolving fund as soon as practicable consistent with the status of the Federal Ship Financing Fund: Provided further, That the total advances outstanding at any one time shall not exceed $10,000,000.