Md. Code, Env't § 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.