48 CFR 901.103: 901.103 Authority.

The DEAR and amendments thereto are issued by the Senior Procurement Executives (SPEs) of the Department of Energy (DOE) and the National Nuclear Security Administration (NNSA). The SPEs may also approve deviations from the DEAR, together and individually. The DOE SPE delegation is pursuant to a delegation from the Secretary of Energy in accordance with the authority of section 644 of the Department of Energy Organization Act (42 U.S.C. 7254), section 205(c) of the Federal Property and Administrative Services Act of 1949, as amended (40 U.S.C. 121(c)(2)), and other applicable laws. The NNSA SPE delegation is pursuant to a delegation from the Administrator of the NNSA, in accordance with section 3212 of the National Nuclear Security Administration Act (50 U.S.C. 2402), section 205(c) of the Federal Property and Administrative Services Act of 1949, as amended (40 U.S.C. 121(c)(2)), and other applicable laws. Except for the authorities designated as non-delegable, the SPEs are delegated the authorities assigned to the Agency Head in the FAR. A reference to the SPE refers to the DOE SPE and the NNSA SPE, unless otherwise indicated.