5 U.S.C. § 5517 - U.S. Code - Unannotated Title 5. Government Organization and Employees § 5517. Withholding State income taxes

(a) When a State statute--

the Secretary of the Treasury, under regulations prescribed by the President, shall enter into an agreement with the State within 120 days of a request for agreement from the proper State official. The agreement shall provide that the head of each agency of the United States shall comply with the requirements of the State withholding statute in the case of employees of the agency who are subject to the tax and whose regular place of Federal employment is within the State with which the agreement is made. In the case of pay for service as a member of the armed forces, the preceding sentence shall be applied by substituting “who are residents of the State with which the agreement is made” for “whose regular place of Federal employment is within the State with which the agreement is made”.

(b) This section does not give the consent of the United States to the application of a statute which imposes more burdensome requirements on the United States than on other employers, or which subjects the United States or its employees to a penalty or liability because of this section. An agency of the United States may not accept pay from a State for services performed in withholding State income taxes from the pay of the employees of the agency.

(c) For the purpose of this section, “State” means a State, territory, possession, or commonwealth of the United States.

(d) For the purpose of this section and sections 5516 and 5520, the terms “serve as a member of the armed forces” and “service as a member of the Armed Forces” include--