Answer: There are several advantages:
No. Research.gov, Grants.gov and Cayuse 424 do not support these applications. The PI must still use FastLane to prepare these applications.
b. Submission of a collaborative proposal from multiple organizations [Each organization submits via NSF FastLane and receives a separate award from NSF.]
Yes, as long as it is before the submission deadline. There are no changes in normal FastLane functionality.
Answer: Yes. Research.gov is a submission endpoint not a proposal creation system. (See Slide 8 of Submitting NSF proposals via Cayuse424)