Md. Code, Environment § 15-1204

(a) (1) An owner of a mineral interest may record, at any time, a notice of intent to preserve the mineral interest or a part of a mineral interest.

(2) A mineral interest is preserved in the county in which the notice is recorded.

(b) (1) The following individuals may record a notice in accordance with subsection (a) of this section:

(i) An owner of the mineral interest;

(ii) Another person legally authorized to act on behalf of the owner; or

(iii) A co–owner, for the benefit of any or all co–owners.

(2) A notice recorded under subsection (a) of this section shall contain:

(i) 1. The name of the owner, or co–owners, of the mineral interest; or

2. If the identity of the owner cannot be determined, information that states that the owner cannot be determined; and

(ii) An identification of the mineral interest or part of the mineral interest to be preserved, in accordance with subsection (c) of this section.

(c) A mineral interest shall be identified by:

(1) A reference to the location in the records of the instrument that creates, reserves, or otherwise evidences the interest;

(2) The judgment or decree that confirms the mineral interest;

(3) A legal description of the mineral interest, if accompanied by a reference to the name of the record owner under whom the owner of the mineral interest claims; or

(4) A general reference to any or all mineral interests of the owner in any real property situated in the county, if:

(i) A previously recorded instrument created, reserved, or otherwise evidenced the mineral interest; or

(ii) A judgment or decree confirms the mineral interest.