Operation Lone Star Reimbursement ActThis bill allows Texas to receive reimbursement for expenses incurred from 2021 through 2025 related to securing the southern U.S. border. Texas must submit these expenses to the Department of Homeland Security (DHS) and the Department of the Treasury. DHS must review the submission within 120 days and determine which expenses are eligible for reimbursement. Treasury must pay such reimbursable expenses within 60 days.