The US government’s definition of the “Inspection, Investigation, Enforcement, and Compliance Group” designations rated at the 1800 level: “This group includes all classes of positions the duties of which are to advise on, administer, supervise, or perform inspection, investigation, enforcement, or compliance work primarily concerned with alleged or suspected offenses against the laws of the United States or such work primarily concerned with determining compliance with laws and regulations” (US OPM, 2018, p. 108).
US Office of Personnel Management (2018, Dec.). Handbook of occupational groups and families. Retrieved from https://www.opm.gov/policy-data-oversight/classification-qualifications/classifying-general-schedule-positions/occupationalhandbook.pdf