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 I—Operational Provisions (§137.160 to §137.220) > 137.167—What cost principles must a Self-Governance Tribe follow when participating in self-governance under Title V?