Md. Code Ann., Tax-Prop. § 14-873 — § 14-873

(a) In this part the following words have the meanings indicated.
(b) “Interested party” means:
(1) the person who last appears as owner of the real property on the collector’s tax roll;
(2) a mortgagee of the property or assignee of a mortgage of record;
(3) a holder of a beneficial interest in a deed of trust recorded against the real property;
(4) a taxing agency that has the authority to collect tax on the real property; or
(5) any person having an interest in the real property whose identity and address are:
(i) reasonably ascertainable from the county land records; or
(ii) revealed by a full title search consisting of at least 50 years.
(c) “Tax” has the meaning stated in § 14–801 of this subtitle.