The UASI Act (Unifying American Security Interests Act) modifies how federal Urban Areas Security Initiative grants are distributed to cities and states by requiring that at least 30 percent of grant funds be allocated across five national priority areas, with specific minimums for election security (3 percent) and border enforcement activities (10 percent). The border enforcement portion mandates that grant recipients participate in immigration enforcement programs, cooperate with U.S. Immigration and Customs Enforcement on detainers, share information with federal immigration officials, and support activities like screening in correctional facilities. Grant applicants must submit detailed justifications for their border enforcement projects and certify compliance with all Department of Homeland Security requirements. The legislation applies to all Urban Areas Security Initiative grants awarded starting in fiscal year 2027, and requires the Homeland Security Secretary to enforce compliance through potential penalties including grant denial, fund holds, or award termination for jurisdictions that fail to meet the spending requirements.