Maryland Code, Estates and Trusts § 5-802

(1) The original executed will is alleged to be lost or destroyed;

(2) A duplicate reproduction of the original executed will, evidencing a copy of the original signatures of the decedent and the witnesses, is offered for admission; and

(3) All the heirs at law and legatees named in the offered will execute a consent in the manner set forth in § 5-803 of this subtitle.