This bill proposes to amend the Internal Revenue Code of 1986 to enable the termination of tax-exempt status for organizations deemed to be terrorist supporting organizations . Such an organization is defined as one designated by the Secretary of the Treasury for providing more than a de minimis amount of material support or resources to a terrorist organization within a three-year period. Excluded from this definition are support approved by the Secretary of State with the Attorney General's concurrence, and humanitarian aid approved by the Office of Foreign Assets Control. Before designation, the Secretary must provide written notice detailing the alleged support and the supported entities. The organization then has a 90-day opportunity to cure , during which it can demonstrate no support was provided, make efforts to retrieve support and certify no future support, or challenge the Secretary's decision to withhold information for national security reasons. A certification of no future support is only valid if the organization has not made a similar certification in the preceding five years. The bill also outlines conditions for rescission of a designation, such as if it was erroneous or if the organization proves it did not receive initial notice and then satisfies cure requirements. Disputes are subject to resolution by the IRS Independent Office of Appeals, and United States district courts have exclusive jurisdiction to review determinations involving classified information and final designations.