(a) In Baltimore City, the Mayor and City Council may not sell a property to enforce a lien for unpaid charges for water and sewer service unless:
(1) the lien is for at least $350;
(2) the property is not:
(i) a residential property; or
(ii) real property that is exempt from taxation under § 7–204(1) or (2) of this article; and
(3) the unpaid charges for water and sewer service are at least 3 quarters in arrears.
(b) Notwithstanding subsection (a) of this section, the Mayor and City Council may enforce a lien on a property other than residential property or real property that is exempt from taxation under § 7–204(1) or (2) of this article for unpaid water and sewer service that is less than $350 if the property is being sold to enforce another lien.
(c) This section does not affect any other right or remedy of Baltimore City for the collection of a water and sewer service charge.