Section 16-2390 - Jurisdiction(a) Subject to subsection (b) of this section, the court shall have jurisdiction to enter guardianship order and shall retain jurisdiction to enforce, modify, or terminate a guardianship order until a child reaches 21 years of age; provided, that when the child reaches 18 years of age, the child consents and the court finds it is in the best interest of the child.(b) A child who exits foster care to guardianship may not reenter foster care after age 18. Apr. 4, 2001, D.C. Law 13-273, § 3(b), 48 DCR 1637; Sept. 24, 2010, D.C. Law 18-230, § 502(a), 57 DCR 6951.