§ 7609.
(f)
Additional requirement in the case of a John Doe summons
Any summons described in subsection (c)(1) which does not identify the person with respect to whose liability the summons is issued may be served only after a court proceeding in which the Secretary establishes that—
(1)
the summons relates to the investigation of a particular person or ascertainable group or class of persons,
(2)
there is a reasonable basis for believing that such person or group or class of persons may fail or may have failed to comply with any provision of any internal revenue law, and
(3)
the information sought to be obtained from the examination of the records or testimony (and the identity of the person or persons with respect to whose liability the summons is issued) is not readily available from other sources.
The Secretary shall not issue any summons described in the preceding sentence unless the information sought to be obtained is narrowly tailored to information that pertains to the failure (or potential failure) of the person or group or class of persons referred to in paragraph (2) to comply with one or more provisions of the internal revenue law which have been identified for purposes of such paragraph.
(Added [Pub. L. 94–455, title XII, § 1205(a)], Oct. 4, 1976, [90 Stat. 1699]; amended [Pub. L. 95–599, title V, § 505(c)(6)], Nov. 6, 1978, [92 Stat. 2760]; [Pub. L. 95–600, title VII, § 703](l)(4), Nov. 6, 1978, [92 Stat. 2943]; [Pub. L. 96–223, title II, § 232(d)(4)(E)], Apr. 2, 1980, [94 Stat. 278]; [Pub. L. 97–248, title III], §§ 311(b), 331(a)–(d), 332(a), Sept. 3, 1982, [96 Stat. 601], 620, 621; [Pub. L. 97–424, title V, § 515(b)(12)], Jan. 6, 1983, [96 Stat. 2182]; [Pub. L. 98–369, div. A, title VII, § 714(i)], title IX, § 911(d)(2)(G), July 18, 1984, [98 Stat. 962], 1007; [Pub. L. 98–620, title IV, § 402(28)(D)], Nov. 8, 1984, [98 Stat. 3359]; [Pub. L. 99–514, title VI, § 656(a)], title XV, § 1561(a), (b), title XVII, § 1703(e)(2)(G), Oct. 22, 1986, [100 Stat. 2299], 2761, 2778; [Pub. L. 100–647, title I], §§ 1015(l)(1), (2), 1017(c)(9), (12), Nov. 10, 1988, [102 Stat. 3571], 3572, 3576, 3577; [Pub. L. 104–168, title X, § 1001(a)], July 30, 1996, [110 Stat. 1467]; [Pub. L. 105–206, title III, § 3415(a)]–(c), July 22, 1998, [112 Stat. 755]; [Pub. L. 109–135, title IV, § 408(a)], Dec. 21, 2005, [119 Stat. 2635]; [Pub. L. 116–25, title I, § 1204(a)], July 1, 2019, [133 Stat. 988].)