Maryland Code, Estates and Trusts § 13.5-105

(a)(1) In a guardianship proceeding or protective proceeding, in addition to other procedures that may be available, testimony of witnesses who are located in another state may be offered by deposition or other means allowable in this State for testimony taken in the other state.

(2) The court on its own motion may order that the testimony of a witness be taken in another state and may prescribe the manner in which and the terms on which the testimony is to be taken.

(b)(1) In a guardianship proceeding or protective proceeding, a court in this State may permit a witness located in another state to be deposed or to testify by telephone or audiovisual or other electronic means.

(2) A court of this State shall cooperate with courts of other states in designating an appropriate location for a deposition or testimony in a guardianship proceeding or protective proceeding under this section.