55 ILCS 5/5-31017

Nothing in this Division shall prohibit the museum district from appropriating funds as otherwise provided in this Division for the construction, equipment, extension, improvement, operation or maintenance of any historical building, monument or marker. Provided, however, that any work performed on any historical building, monument or marker listed on the National Register of Historic Places or deemed eligible for such listing shall be conducted within such guidelines as are established by the Department of Natural Resources.