Generally, trainees cannot be supported simultaneously on two federal funding sources, except in certain instances. The rule is: compensation may not be paid from a (federal) research grant which supports the same research that is part of the trainee’s planned training experience as approved in the training grant application. (NIH Guide for Contracts and Grants, Vol. 13, No. 1, 1/6/84). However, if both sources are federal training grants, and the combined support from both does not exceed the stipend ceiling, a student can receive funding from two federal sources.