42 U.S.C. § 7235: Armed services personnel

(a) The Secretary is authorized to provide for participation of Armed Forces personnel in carrying out functions authorized to be performed, on August 4, 1977, in the Energy Research and Development Administration and under chapter 869 of title 10. Members of the Armed Forces may be detailed for service in the Department by the Secretary concerned (as such term is defined in section 101 of such title) pursuant to cooperative agreements with the Secretary. (b) The detail of any personnel to the Department under this section shall in no way affect status, office, rank, or grade which officers or enlisted men may occupy or hold or any emolument, perquisite, right, privilege, or benefit incident to, or arising out of, such status, office, rank, or grade. A member so detailed shall not be subject to direction or control by his armed force, or any officer thereof, directly or indirectly, with respect to the responsibilities exercised in the position to which detailed.