In the event that insufficient funds are available to the Secretary in any fiscal year to enable him or her to pay to all schools their proportionate shares of all loans and interest canceled under this subpart for full-time employment as a nurse, death, or disability:

(a) Each school will be paid an amount bearing the same ratio to the total of the funds available for that purpose as the principal of loans canceled by that school in that fiscal year bears to the total principal of loans canceled by all schools in that year; and

(b) Any additional amounts to which a school is entitled will be paid by the Secretary at the time of distribution of the assets of the school's fund under section 839 of the Act.