Maryland Code, Business Regulation § 12-305

(2) A dealer who acquires a precious metal object at an event which takes place at a location other than the dealer's fixed business address shall place the object and a record of its acquisition at a location in accordance with subsection (d)(1) or (2) of this section by the next business day after acquiring the object.

(3) In partial compliance with the 18-day holding requirement under this subsection, a dealer may maintain an object and the record of its acquisition at a location other than the dealer's fixed business address, if the local law enforcement unit in the jurisdiction where the item was acquired provides written approval.

(b)(1) A dealer may submit to the primary law enforcement unit a written request for a shorter holding period for a specific precious metal object.

(2) Within 48 hours after the primary law enforcement unit receives a request, the primary law enforcement unit shall approve or deny the request.

(3) After inspecting the precious metal object, the primary law enforcement unit may authorize in writing a shorter holding period.

(4) If the primary law enforcement unit denies the request, the primary law enforcement unit shall state the reasons in writing.

(c)(1) Except as provided in paragraph (2) of this subsection, a dealer may not alter a precious metal object before or during the holding period.

(2) During the holding period, a dealer may chemically test a precious metal object to determine its metal content or value if the dealer does not alter the precious metal object so as to affect its identification or value.

(1) the place of business of the dealer; or

(2) a storage facility specified in the license application of the dealer.