References

IACUC Authority To Suspend Activities

From the USDA Animal Welfare Act Regulations, Section 2.31-

“(8) Be authorized to suspend an activity involving animals in accordance with the specifications set forth in paragraph (d)(6) of this section. 
The IACUC may suspend an activity that it previously approved if it determines that the activity is not being conducted in accordance with the description of that activity provided by the principal investigator and approved by the Committee.The IACUC may suspend an activity only after review of the matter at a convened meeting of a quorum of the IACUC and with the suspension vote of a majority of the quorum present;If the IACUC suspends an activity involving animals, the Institutional Official, in consultation with the IACUC, shall review the reasons for suspension, take appropriate corrective action, and report that action with a full explanation to APHIS and any Federal agency funding that activity; andProposed activities and proposed significant changes in ongoing activities that have been approved by the IACUC may be subject to further appropriate review and approval by officials of the research facility. However, those officials may not approve an activity involving the care and use of animals if it has not been approved by the IACUC.”

www.access.gpo.gov/nara/cfr/waisidx/9cfr2.htmland

From PHS Policy, Section IV.-

” B. Functions of the Institutional Animal Care and Use Committee 
As an agent of the institution, the IACUC shall with respect to PHS – conducted or supported activities: 
8. … be authorized to suspend an activity involving animals in accordance with the specifications set forth in IV.C.6 of this Policy.” 
(Section IV.C.6.) 

  1.  The IACUC may suspend an activity that it previously approved if it determines that the activity is not being conducted in accordance with applicable provisions of the Animal Welfare Act, the Guide, the institution’s Assurance, or IV.C.1.a.-g. of this Policy. The IACUC may suspend an activity only after review of the matter at a convened meeting of a quorum of the IACUC and with the suspension vote of a majority of the quorum present
  2. If the IACUC suspends an activity involving animals, the Institutional Official in consultation with the IACUC shall review the reasons for suspension, take appropriate corrective action, and report that action with a full explanation to OLAW.”

http://grants.nih.gov/grants/olaw/references/phspol.htm