Legal Question in Construction Law in Illinois

Probably not.

Possibly.... Really someone will have to review the subcontract in particular, and possibly the plans and specs as well, and beyond that potentially local code. While a formal subcontract should incorporate the plans and specs as "contract documents", there could be overriding provisions or, if the plans and specs themselves don't conform to local code requirements, then industry standards may apply, especially where the local code requires industry standards or guidelines to control instead. But usually if there is a conflict in the contract documents, the architect is usually called in to decide which controls. Moreover, the architect, under a formal subcontract, usually has "final say" on whether the work was done properly per the contract documents. If the subcontract does not protect the general contractor (or owner) however, then there could be problems, because in that case in particular local codes could themselves override plans and specs in certain cases.