For what length and period of time can traineeship appointments be made?

The minimum trainee appointment time is nine months for MPH and MS trainees. The minimum trainee appointment time is twelve months for PhD trainees. Exceptions are possible–for example, when a trainee graduates mid-year. The student’s appointment period does not have to coincide with the time period of the grant. It is possible to appoint a PhD trainee for 12 months beginning in any month of the grant year as long as the appointment ends within the 5-year grant period. Only the beginning date must fall within the grant period.