(January 8, 2024, 12:44 PM EST) -- WASHINGTON, D.C. — In a petitioners’ brief on the merits in the U.S. Supreme Court, the secretary of Health and Human Services (HHS) argues that the Indian Self-Determination and Education Assistance Act (ISDA) does not require the Indian Health Service (IHS) to pay “contract support costs” for expenditures of income collected by Indian tribes from third parties under federal self-determination contracts....