District of Columbia Code
Chapter 5 - Estates in Land
§ 42–503. Fee simple estates — Absolute or qualified

An estate in fee simple may be either absolute or qualified, as to one and his heirs during an existing condition of things of uncertain duration.
(Mar. 3, 1901, 31 Stat. 1351, ch. 854, § 1013.)
1981 Ed., § 45-203.
1973 Ed., § 45-803.