Maryland Code, Estates and Trusts § 15-105

(a) A fiduciary, or party of whom a bond, undertaking or other obligation is required, may agree or arrange with a surety for a general or a special deposit for safekeeping of any money, assets and other property, for which the fiduciary is or may be responsible, with a bank, savings bank, safe deposit or trust company authorized by law to do business and situate in the county in which the fiduciary's bond is filed.

(b) A deposit shall be made in a manner as to prevent the withdrawal or alienation of money, assets, or other property, or any part of it, without the written consent of the surety, or an order of a court, made on notice to the surety as the court directs.