CFR > Title 42 - Public Health > CHAPTER I—PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES > SUBCHAPTER M—INDIAN HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES (parts 136 to 138) > PART 137—TRIBAL SELF-GOVERNANCE > SUBPART J—Regulation Waiver (§137.225 to §137.231) > 137.228—Upon what basis may the waiver request be denied?