Nothing in this Section shall be construed to authorize a county to impose a tax upon the privilege of engaging in any business which under the Constitution of the United States may not be made the subject of taxation by this State.
An ordinance or resolution imposing a tax hereunder or effecting a change in the rate thereof shall be effective on the first day of the calendar month next following its passage and required publication.
The amounts collected by any county pursuant to this Section shall be expended to promote tourism; conventions; expositions; theatrical, sports and cultural activities within that county or otherwise to attract nonresident overnight visitors to the county.
Any county may agree with any unit of local government, including any authority defined as a metropolitan exposition, auditorium and office building authority, fair and exposition authority, exposition and auditorium authority, or civic center authority created pursuant to provisions of Illinois law and the territory of which unit of local government or authority is co-extensive with or wholly within such county, to impose and collect for a period not to exceed 40 years, any portion or all of the tax authorized pursuant to this Section and to transmit such tax so collected to such unit of local government or authority. The amount so paid shall be expended by any such unit of local government or authority for the purposes for which such tax is authorized. Any such agreement must be authorized by resolution or ordinance, as the case may be, of such county and unit of local government or authority, and such agreement may provide for the irrevocable imposition and collection of said tax at such rate, or amount as limited by a given rate, as may be agreed upon for the full period of time set forth in such agreement; and such agreement may further provide for any other terms as deemed necessary or advisable by such county and such unit of local government or authority. Any such agreement shall be binding and enforceable by either party to such agreement. Such agreement entered into pursuant to this Section shall not in any event constitute an indebtedness of such county subject to any limitation imposed by statute or otherwise.
55 ILCS 5/5-1030