Md. Code Ann., Tax-Prop. § 14-874 — § 14-874

(a) Real property may be subject to foreclosure and sale under this part only if:
(1) the property consists of a vacant lot or improved property cited as vacant and unsafe or unfit for habitation or other authorized use on a housing or building violation notice; and
(2) the total amount of liens for unpaid taxes on the property exceeds the lesser of the total value of the property as last determined by the Department or as determined by an appraisal report prepared not more than 6 months before the filing of a complaint under this section by a real estate appraiser who is licensed under Title 16 of the Business Occupations and Professions Article.
(b) (1) A county or municipal corporation may authorize by law an in rem foreclosure in accordance with this part.
(2) A law that authorizes an in rem foreclosure shall:
(i) state the date after which real property may be subject to in rem foreclosure under this part;
(ii) establish criteria for designating real property to be foreclosed under this part;
(iii) authorize the county or municipal corporation to file a complaint for an in rem foreclosure under this part; and
(iv) include administrative rules and procedures necessary to carry out an in rem foreclosure under this part.
(c) (1) Subject to subsection (d) of this section, a county or municipal corporation may authorize, by law, the sale of real property after an in rem foreclosure and designate real property to be sold under this part.
(2) A law that authorizes a sale of real property after an in rem foreclosure shall:
(i) state the date after which the real property may be subject to sale after an in rem foreclosure under this part;
(ii) establish criteria for designating real property to be sold under this part; and
(iii) include administrative rules and procedures necessary to carry out a sale under this part.
(d) Only real property that consists of a vacant lot or improved property cited as vacant and unsafe or unfit for habitation or other authorized use on a housing or building violation notice may be sold under this part.