(2) Notwithstanding article eighteen-A of the general municipal law and titles eleven and fifteen of article eight of the public authorities law, no mortgage of real property situated within the state in counties located within the metropolitan commuter transportation district, the Niagara Frontier transportation district, the Rochester-Genesee transportation district, the capital district transportation district, and the central New York regional transportation district executed, given, made, or transferred or assigned by or to an agency created under article eighteen-A of the general municipal law, an authority created under title eleven or fifteen of article eight of the public authorities law, an agent or agent of such agent of such agency or authority, a project operator receiving financial assistance from such agency or authority, a project occupant of such agency or authority, or an owner of a project receiving financial assistance from such agency or authority shall be exempt from the additional tax imposed by paragraph (a) of subdivision two of section two hundred fifty-three of this article. For the purposes of this subdivision the term "financial assistance" shall have the same meaning as defined in section eight hundred fifty-four of the general municipal law.