Maryland Code, Commercial Law § 16-503

(a) Any person who takes boarders or lodgers into his house has a lien on the furniture or other property which the boarder or lodger has on the person's premises for the contract price due or to become due for the room or board furnished.

(b) The person may retain possession of the property to which the lien attaches until all charges due or to become due to him are paid.

(c) If the charges which give rise to the lien are unpaid after they become due, the person may sell the property to which the lien attaches at public or private sale.

(d) The person shall give at least 10 days reasonable notice of the sale to the boarder or lodger.