From the Overview: "The Trade Promotion Authority (TPA), previously known as 'Fast-Track Authority,' is the time-limited authority that Congress uses to set trade negotiating objectives, to establish notification and consultation requirements, and to consider implementing legislation for certain reciprocal trade agreements under expedited procedures, provided that they meet certain statutory requirements. [...] The Bipartisan Congressional Trade Priorities and Accountability Act of 2015 (TPA) (P.L. 114-26) was signed by then-President Obama on June 29, 2015, after a contentious legislative debate. TPA is authorized through July 1, 2021."
CRS In Focus, IF10038
Congressional Research Service: https://crsreports.congress.gov/