§ 2612.
(a)
Taxable termination
(1)
General rule
For purposes of this chapter, the term “taxable termination” means the termination (by death, lapse of time, release of power, or otherwise) of an interest in property held in a trust unless—
(A)
immediately after such termination, a non-skip person has an interest in such property, or
(B)
at no time after such termination may a distribution (including distributions on termination) be made from such trust to a skip person.
(2)
Certain partial terminations treated as taxable
(Added [Pub. L. 94–455, title XX, § 2006(a)], Oct. 4, 1976, [90 Stat. 1883]; amended [Pub. L. 99–514, title XIV, § 1431(a)], Oct. 22, 1986, [100 Stat. 2719]; [Pub. L. 100–647, title I, § 1014(g)(5)(B)], (7), (15), Nov. 10, 1988, [102 Stat. 3564–3566]; [Pub. L. 105–34, title V, § 511(b)], Aug. 5, 1997, [111 Stat. 861].)