(a) No person may rent, sell, or offer for sale to anyone within this State any modular dwelling or mobile structure after the effective date of this amendatory Act of the 98th General Assembly, unless it bears a seal issued by the Department and a certification by the manufacturer, that the mobile structure or modular dwelling complies with the applicable safety code.
     (b) Nothing in this Act prohibits a city, town, village, township, or county from adopting construction standards for mobile structures or modular dwellings under local ordinances, provided such ordinances incorporate the rules adopted under this Act and are approved by the Department. This Section is a limitation under subsection (i) of Section 6 of Article VII of the Illinois Constitution on the concurrent exercise by home rule units of powers and functions exercised by the State. Any unit of local government is authorized to adopt by reference the safety codes as promulgated by the Department.