One can also look at restrictions such as being a teaching or research assistant. I do not think FORD or NDSEG has a policy, like the NSF, where you cannot (or need exception) gain other forms of income. Of course, the NSF allows you to defer, but this is not the same as receiving the award and being able to find other forms of income. To ensure what I am saying is correct, check out the websites. I think the FORD's only restriction is that the TA ship or whatever cannot be full time.