The Secretary or Administrator shall, as specified in the escrow agreement, disburse the escrow fund to pay amounts the obligor is obligated to pay as interest on such obligations or for the construction, reconstruction, or reconditioning of the vessel or vessels used as security for the guarantee of the Secretary or Administrator under this subchapter, to redeem such obligations in connection with a refinancing under paragraph (4) of section
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(a) of this Appendix or to pay to the obligor at such times as may be provided for in the escrow agreement any excess interest deposits, except that if payments become due under the guarantee prior to the termination of the escrow agreement, all amounts in the escrow fund at the time such payments become due (including realized income which has not yet been paid to the obligor) shall be paid into the Fund and (i), be credited against any amounts due or to become due to the Secretary or Administrator from the obligor with respect to the guaranteed obligations and (ii) to the extent not so required, be paid to the obligor.