Md. Code, Real Property § 3-501

(a) (1) The Clerk of the Circuit Court for Montgomery County shall:

(i) Assign to each parcel of real property in the county an individual parcel identifier, numerical or otherwise; and

(ii) Record by parcel identifier in a parcel index any instrument or reference to an instrument presented for recording after June 30, 1981.

(2) Information recorded by parcel identifier in a parcel index shall be the legal record of interests affecting any parcel.

(b) (1) (i) Except as provided by subparagraph (ii) of this paragraph, all interests created after June 30, 1981 that are enforceable against real property, shall be recorded in the land records by serial number (liber or folio, or other number as the Clerk determines) and by parcel identifier.

(ii) The provisions of this subsection do not apply to:

1. Contracts for conveyance of real property;

2. Leases not required to be recorded under § 3-101(c) or (d) of this title;

3. Liens of judgment created by § 11-402 of the Courts and Judicial Proceedings Article, and other actions in law or equity which constitute a claim against or encumbrance upon the property;

4. Liens arising from nonpayment of real property taxes; and

5. Claims of the United States not subjected by federal law to the recording requirements of this State.

(2) An instrument may not be recorded after June 30, 1981 unless it is legible and contains:

(i) The parcel identifier;

(ii) The county tax account number for the parcel, if any, and if it is different from the parcel identifier;

(iii) The record legal description of the boundaries of the parcel;

(iv) The street address of the parcel, if any;

(v) The full name and address of each party to that instrument and the nature of the party’s interest; and

(vi) The name of any title insurer insuring the instrument.

(3) An instrument is not rendered invalid by failure to comply with the requirements of this section.