Again, that is the completely wrong grant. He didn't have a NRSA postdoctoral award.Look at the payback clause
The NRSA Payback Service Center administers payback requirements for the Ruth L. Kirschstein National Research Service Awards (NRSA).
The NRSA legislation requires Postdoctoral recipients of support to “pay back” the U.S. Government by engaging in health-related biomedical or behavioral research. This includes direct administration or review of health-related research, health-related teaching, or any combination of these activities. Postdoctoral trainees and fellows are required to begin engaging in acceptable payback activities within two years of their termination. Postdoctoral trainees and fellows who cannot engage in payback service can request to pay back their debt financially. Extensions of time to initiate payback service, as well as payback deferrals and waivers, are granted under certain situations and circumstances.
http://grants.nih.gov/training/payback.htm
so if he will drop/withdraw this then he has to pay back all the tuition fees NIH paid for him if he will not work......
Postdoctoral means after PhD. He didn't yet have a PhD. He had a B.S.. If he graduated he would get a PhD.