For subcontracting purposes pursuant to sections 8(d) of the Small Business Act, a concern is small for subcontracts which relate to Government procurements if it does not exceed the size standard for the NAICS code that the prime contractor believes best describes the product or service being acquired by the subcontract. However, subcontracts for engineering services awarded under the National Energy Policy Act of 1992 have the same size standard as Military and Aerospace Equipment and Military Weapons under NAICS code 541330.