Md. Code, Estates and Trusts § 5–205

(a) The petition shall also contain a request for either of the acts provided in this section.

(b) (1) The petition shall request the grant of letters to the petitioner, if:

(i) The petition is filed by all of the persons named as executors in the will of a testate decedent; or

(ii) The persons in classes higher in the order of priority set forth in § 5–104 of this title of those entitled to administer the estate of an intestate decedent join in the petition or consent in writing to the grant.

(2) The joinder or consent of a person who has renounced the right to administer is not necessary.

(c) The petition shall request an order requiring persons named as executors or entitled to administration to appear and qualify for appropriate letters.