Can there be separate science and budget PIs?
Yes, the PI for the second (budget) phase may be a different person than the PI for the first (scientific justification) phase. Please state in the first phase proposal that the budget will be submitted with a different PI; similarly, in the second phase proposal please identify the proposal number of the first phase proposal. Both PIs are responsible for ensuring that the institution through which the budget proposal will be submitted is willing and able to accept a Fermi GI program grant and to disburse the funds as requested.