(a) The Authority created by this Article shall receive financial support from the State in the amounts provided for in Section 4 of the Metropolitan Civic Center Support Act, as now or hereafter amended. Notwithstanding anything to the contrary, the Authority’s base sum of State financial support under subdivision (3)(a)(ii) of Section 4 of the Metropolitan Civic Center Support Act, as now or hereafter amended, shall be calculated by using the multiplier contained in that Act times the total assessed valuation, as equalized by the Department of Revenue, of all taxable property located within the metropolitan area of the Authority for the year 1987.
     (b) The Authority created by this Article may receive financial support from any municipality in order for the Authority to undertake any of its authorized rights and powers. Any municipality, both within and outside of the metropolitan area, is authorized to pay and to irrevocably pledge to the Authority or the holders of any bonds issued and sold by the Authority pursuant to this Article any or all of its existing and future revenues derived from its imposition of a tax upon all persons engaged in such municipality in the business of renting, leasing or renting rooms in a hotel, as defined in the Hotel Operator’s Occupation Tax Act, as now or hereafter amended, provided such municipality determines, in its discretion, that such payment or pledge shall assist in, among other things, attracting nonresident, overnight visitors to that municipality.