26 CFR § 301.7621-1
Internal revenue districts
June 25, 2020
For delegation to the Secretary of authority to prescribe internal revenue districts for the purpose of administering the internal revenue laws, see Executive Order No. 10289, dated September 17, 1951 (16 FR 9499), as made applicable to the Code by Executive Order No. 10574, dated November 5, 1954 (19 FR 7249).