CFR > Title 21 - Food and Drugs > CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER H—MEDICAL DEVICES (parts 800 to 898) > PART 812—INVESTIGATIONAL DEVICE EXEMPTIONS > SUBPART D—IRB Review and Approval (§812.60 to §812.66) > 812.64—IRB's continuing review.