The United States federal budget is divided into three categories: mandatory spending, discretionary spending, and interest on debt. Also known as entitlement spending, in US fiscal policy, mandatory spending is government spending on certain programs that are required by law. Congress established mandatory programs under authorization laws. Congress legislates spending for mandatory programs outside of the annual appropriations bill process. Congress can only reduce the funding for programs by changing the authorization law itself. This requires a 60-vote majority in the Senate to pass. Discretionary spending on the other hand will not occur unless Congress acts each year to provide the funding through an appropriations bill.