From: USDA Animal Welfare Act Regulations, 9 CFR Part 2 (Regulations), Subpart C (Research Facilities), Section 2.31 (Institutional Animal Care and Use Committee, IACUC), paragraph (d)(iv)(B):
“(iv) Procedures that may cause more than momentary or slight pain or distress to the animals will: . . . (B) Involve, in their planning, consultation with the attending veterinarian or his or her designee.”
See the source document in text or PDF format at the National Archives and Records website (home page is http://www.gpoaccess.gov/index.html). The document can also be accessed at www.iacuc.org.