An Indian tribe or tribal organization may, by formal action, waive the service agreement of an Indian student for just cause, as determined in accordance with regulations prescribed by the Secretary. The tribe or organization shall notify the Secretary in writing of any waiver granted under this subsection.
The Secretary shall, by regulation, provide for the pro rata reduction of repayment obligations under subsection (a)(2) in the case of any student who partially completes the service obligation of that student under subsection (a)(2)(A).