It is declared to be the public policy of this State, pursuant to subsection (h) of Section 6 of Article VII of the Illinois Constitution of 1970, that any power or function set forth in this Act to be exercised by the State is an exclusive State power or function. Such power or function shall not be exercised concurrently, either directly or indirectly, by any unit of local government, including home rule units, except as otherwise provided in this Act. The fees, charges, and taxes provided for by this Act shall, as provided in Section 15.1 of this Act, be in lieu of all license fees or privilege or occupation taxes or other fees levied or assessed by any home rule unit.