There are appropriated, out of any money in the Treasury not otherwise appropriated, such sums as are necessary to pay, during the period of a lapse in discretionary appropriations beginning on or about December 22, 2018, the salaries and expenses of any officer or employee of the Coast Guard, Customs and Border Protection, Immigration and Customs Enforcement, Transportation and Security Administration, or the E-Verify program who is excepted from the furlough resulting from such lapse.