This concurrent resolution establishes the Commission on Evidence-Based Policymaking within the legislative branch, tasked with reviewing and analyzing how to promote the use of Federal data for evidence-building and evidence-based policymaking. The Commission will ultimately make recommendations to Congress on these critical areas. The Commission will comprise 12 members , with appointments divided equally among the Speaker of the House, the House Minority Leader, the Senate Majority Leader, and the Senate Minority Leader. Each appointing authority will select an academic researcher, a former Member or senior staffer, and an employee from a legislative branch support agency, ensuring a diverse range of expertise. Current Members of Congress are explicitly prohibited from serving on the Commission. Key areas for the Commission's recommendations include encouraging Federal agencies to produce and prioritize evidence for new programs and reauthorizations, consistent with existing law. It will also explore how to support States in making data more open and accessible, and how Congress can revise laws to improve access to administrative and survey data for evidence building. Furthermore, the Commission will examine methods to incorporate outcomes measurement, rigorous impact analysis, and machine-readable data into the lawmaking process. It will also consider the potential need for a congressional Chief Data Officer and strategies to increase data and data privacy expertise within Congress through the integration of technologists, data scientists, and privacy experts. Any recommendations considered by the Commission will require the approval of at least two-thirds of its members. The Commission is mandated to submit a final report to the Speaker of the House and the Senate Majority Leader by the end of the One Hundred Nineteenth Congress, detailing its activities and findings.