Which policy states that IACUC members may not contribute to a quorum when reviewing their own protocols?

The correct response is the PHS Policy. This policy includes guidelines that require IACUC members to recuse themselves from the review of protocols in which they have a personal or financial interest, thereby ensuring objectivity and impartiality in the review process. This provision is essential for maintaining integrity and trust in the oversight of animal research, as it helps to prevent conflicts of interest that could compromise the welfare of the animals involved.

The other options may address various aspects of animal research and regulations, but they do not specifically articulate the restriction on members reviewing their own protocols. For instance, the USDA/APHIS Policy focuses primarily on the enforcement of standards for animal care and use, while the Animal Welfare Act provides a broader legislative framework regulating animal welfare. Institutional policies can vary widely and may incorporate these guidelines differently, but the specific directive regarding recusal for personal interest is clearly delineated in the PHS Policy.