Important policy update: NSF has issued a supplemental Policy Notice that applies to all financial assistance awarded by the agency on or after Dec. 8, 2025. The notice supplements the 2024 Proposal and Award Policies and Procedures Guide (PAPPG 24-1) — implementing time-sensitive statutes and practices. Additional policy notices may follow.

In the case of any inconsistency between the coverage contained in the NSF Proposal and Award Policies and Procedures Guide and 2 CFR (including 2 CFR part 200), the coverage specified in 2 CFR applies.

Exhibit II-2: Potentially Disqualifying Conflicts of Interest

Unless a waiver has been granted by NSF, a reviewer cannot review a proposal if:

  • the reviewer, the reviewer's spouse, minor child, or business partner;
  • an organization where the reviewer is employed, serves as a consultant, has an arrangement for future employment or is negotiating for employment; or
  • the organization where the reviewer is an officer, director, trustee, or partner;

has a financial interest in the outcome of the proposal.

Unless a waiver has been granted by NSF, a potential reviewer also may be barred from reviewing a proposal, if it involves individuals with whom the potential reviewer has a personal relationship, such as a close relative, current or former collaborator, or former Ph.D. student/advisor.

Unless a waiver has been granted by NSF, a disqualifying conflict may exist, if a proposal involves an organization or other entity with which the potential reviewer has a connection. Such potentially disqualifying connections include:

  • a reviewer's recent former employer;
  • an organization in which the reviewer is an active participant;
  • an institution at which the reviewer or a member of the reviewer's household is currently enrolled as a student, or at which the reviewer serves as a visiting committee member; or 
  • an entity with which the reviewer has or seeks some other business or financial relationship (including receipt of an honorarium).