As used in this Act:
     “Industrialized residential structure” means a manufactured housing unit that is intended to contain or contains only one or 2 dwelling units and is constructed in conformance with a model building code published by a model code organization.
     “Manufactured housing unit” has the meaning ascribed to that term in the Illinois Manufactured Housing and Mobile Home Safety Act.
     “Model code organization” has the meaning ascribed to that term in 77 Ill. Adm. Code 880.10.