Every fact material to determine the propriety of a sale or exchange shall be clearly proved, in a proceeding brought pursuant to section 21-148 , by disinterested witnesses, whose testimony shall be taken in writing in the presence of the guardian ad litem or upon interrogatories agreed upon by him.
D.C. Code § 21-150
Proof
Sept. 14, 1965, 79 Stat. 743, Pub
Official source: D.C. Law Library (Council of the District of Columbia). Reproduced from public-domain District of Columbia statutes; confirm against the official source for the current text. Not legal advice.