I am a PhD student in the US that is currently paid as a grad research asst. from my advisor's NSF grant full time (100% FTE) during the summer and 1/2 time (50% FTE) during the school year, with the other 50% of my time presumed to be spent on classes. I recently accepted a position as an independent contractor for a consultant working roughly 16-20 hrs a week.
My question is, are there any rules from the NSF regarding this type of arrangement? I need to certify that I spend 40hrs/week on the NSF project (which I do), but I want to make sure myself/my advisor don't get into trouble here. I can't seem to find this addressed anywhere.