"Legislation to reauthorize Trade Promotion Authority ('TPA'), sometimes called 'fast track,' was introduced as the Bipartisan Congressional Trade Priorities and Accountability Act of 2015 (TPA- 2015; H.R. 1890/S. 995) on April 16, 2015. The legislation was reported by the Senate Finance Committee on April 22, 2015, and by the House Ways and Means Committee the next day. TPA, as incorporated into H.R. 1314 by substitute amendment, passed the Senate on May 22 by a vote of 62-37. TPA requires that if the President negotiates an international trade agreement that would reduce tariff or non-tariff barriers to trade in ways that require changes in U.S. law, the United States can implement the agreement only through the enactment of legislation. If the trade agreement and the process of negotiating it meet certain requirements, TPA allows Congress to consider the required implementing bill under expedited ('fast track') procedures, pursuant to which the bill may come to the floor without action by the leadership, and can receive a guaranteed up-or-down vote with no amendments."
CRS Report for Congress, R43491