The Katrina and Leslie Schaller Act aims to extend the Supplemental Security Income (SSI) program to Guam , thereby providing federal assistance to eligible low-income individuals who are aged, blind, or disabled in the territory. This expansion involves several key amendments to the Social Security Act, ensuring Guam's full inclusion in the program. Specifically, the bill removes Guam from exclusions in the Social Security Amendments of 1972 and incorporates it into the definition of "State" for certain Social Security Act programs. It also eliminates existing limits on total federal payments to Guam under these programs and includes Guam in the geographic meaning of the "United States" for SSI purposes. Furthermore, the legislation grants the Commissioner of Social Security the authority to waive or modify SSI requirements in Guam as needed to tailor the program to the territory's unique circumstances.