HB 3471 expands the permissible uses of the Historic Infrastructure Sustainability Trust Fund to allow distributions to be used for maintaining, preserving, rehabilitating, improving, and restoring historic courthouses and historic sites across Texas. The bill mandates that at least one-third of each annual fund distribution be allocated specifically to the Historic Courthouse Preservation Program. It also clarifies that funds cannot be used for salaries, employee benefits, administrative expenses, program costs, or new historic site acquisitions. These changes apply to fund distributions requested by the Texas Historical Commission on or after September 1, 2025.