This bill reauthorizes and extends the demonstration project authority for the Social Security Disability Insurance program, pushing its termination date to December 31, 2031 , and extending the associated waiver authority for benefit requirements until December 31, 2030. It also increases the waiver notice period to 120 days and mandates the inclusion of evaluation metrics for all projects. The legislation clarifies that administrative costs for these experiments will be paid from program administration funds, with participant benefits drawn from the appropriate Social Security Trust Funds. A key new provision ensures that an individual's total income will not be reduced due to their participation in these projects, with all amendments taking effect on January 1, 2027 .