I have a situation similar to the question asked here, with some differences.
I am getting ready to submit an NSF grant proposal (as a PI). On this project, I'd like to work closely with a post-doc researcher, Dr. X, in another university, whose expertise is quite important for the success of this project. My original plan is to have a sub-award for the other university and have Dr. X as a co-PI. In the proposal we highlighted the important role Dr. X will play. Without Dr. X, this proposal will be quite a bit weaker, and probably require a complete rewrite.
We just found out that Dr. X's university as a strange rule: Post-docs cannot be PIs, even for sub-awards. This university's research office suggest including a tenured/tenure-track faculty member as a PI (of the sub-award), but internally, Dr. X will be considered a PI and (presumably) has reporting responsibly.
I imagine this must be a common situation. I wonder how is it usually handled? Would it be reasonable to include a PI (of the sub-award) whose main role is to be a place-holder?
The important difference between the situation I have and that describe in the other question is that I (tenured) will be the PI, so there's no problem there. The only problem is with the sub-award (Dr. X cannot be the PI of the sub-award; someone else in the university must be the PI, and Dr. X could be the co-PI).