Title 5 is the portion of the U.S. code that refers to Administrative Personnel. It was revised and enacted into positive law by Pub. L. 89–554, Sept. 6, 1966. The 865-page document is available online from the U.S. Government Printing Office (GPO) at
A description of “excepted service” is available from the federal government's employment website, www.usajobs.gov. This description defines such positions as “any federal or civil service positions which are not in the competitive service or the Senior Executive service.” Agencies that employ people in excepted service positions have distinct qualification requirements; they are not subject to Title 5 of the U.S. code, in regard to appointment, pay, and classification. Veterans’ preference still apply. The possible ways to be appointed into excepted service include designation by an authority that the Office of Personnel Management (OPM) designates “excepted.” Two examples are veterans recruitment and attorneys.
The OPM website (www.opm.gov) also includes information on excepted service hiring. The description there notes the usual procedure of filling federal jobs, known as civil service position, which require open competition with other applicants. This site includes a link to the schedules that list authorities that can hire applicants for “special jobs” or those related to any “unusual or special circumstances.”