Md. Code, Business Regulation § 12–206

(a) A license authorizes the licensee to do business as a dealer only at the address for which the license is issued.

(b) Notwithstanding subsection (a) of this section, a dealer who holds a license under this subtitle may:

(1) make purchases at an estate and judicial sale; and

(2) transact business at the residence of the owner of a precious metal object or a place where the owner keeps a precious metal object:

(i) on request of the owner; and

(ii) after giving written notice of the proposed transaction and its location to the local law enforcement unit with jurisdiction over that location.