(a) In General.—In addition to any requirements under section 5379(c) of title 5, a participant in the Specialty Education Loan Repayment Program must agree, in writing and before the Secretary may make any payment to or for the participant, to—
successfully complete post-graduate training leading to eligibility for board certification in a specialty;
In the case of a participant who receives an accredited fellowship in a medical specialty other than a medical specialty described in section 7692 of this title, the Secretary, on written request of the participant, may delay the term of obligated service under subsection (a) for the participant until after the participant completes the fellowship, but in no case later than 60 days after completion of such fellowship.
(2) In the formula in paragraph (1):
“A” is the amount the employee owes the Federal Government.
“B” is the sum of all payments to or for the participant under the Specialty Education Loan Repayment Program.
“T” is the number of months in the period of obligated service of the employee.
“S” is the number of whole months of such period of obligated service served by the employee.