This bill would prohibit federal agencies from using taxpayer money to provide housing assistance to people who are unlawfully present in the United States. The prohibition applies to a wide range of housing-related support, including rental assistance, security deposits, housing vouchers, mortgage help, hotel accommodations, utility assistance, and related services like eviction prevention and housing counseling. The bill carves out exceptions for housing assistance provided as part of immigration law enforcement or criminal law enforcement activities. Federal agencies would be required to enforce this prohibition by having recipients of federal funds certify compliance, monitoring adherence to the rule, imposing civil penalties for violations, and potentially barring violators from future federal funding for a period of time. The bill does not specify any funding amount or implementation timeline, leaving enforcement responsibility to individual federal agencies.