This bill amends Title II of the Social Security Act to significantly extend the authority for disability insurance demonstration projects . It pushes the termination date for these projects from December 31, 2022, to December 31, 2031, and similarly extends the period for waiving compliance with benefits requirements to December 31, 2030. These extensions aim to allow for continued experimentation and evaluation within the disability insurance program. The legislation also modifies the process for these projects by requiring the inclusion of evaluation metrics in proposals and increasing the notification period for waivers to 120 days. Furthermore, it clarifies that administrative costs will be paid from Title II administration funds, while participant benefits will come from the appropriate Social Security Trust Funds. A crucial new limitation ensures that an individual's total income will not be reduced as a result of participating in these experiments or demonstration projects, with all changes taking effect on January 1, 2027.