(a) This subtitle applies to:
(1) Affected property; and
(2) Notwithstanding subsection (b) of this section, any residential rental property, the owner of which elects to comply with this subtitle.
(b) This subtitle does not apply to:
(1) Property not expressly covered in subsection (a) of this section;
(2) Affected property owned or operated by a unit of federal, State, or local government, or any public, quasi-public, or municipal corporation, if the affected property is subject to lead standards that are equal to, or more stringent than, the risk reduction standard established under § 6-815 of this subtitle; or
(3) Affected property which is certified to be lead-free pursuant to § 6-804 of this subtitle.