(a) The Illinois Environmental Protection Agency shall be the reviewing Department for any regulated release subject to the Toxic Substances Control Act.
     (b) The Department of Agriculture shall be the reviewing Department for any regulated release subject to any federal requirement in the coordinated framework, except a requirement under the Toxic Substances Control Act.
     (c) If a regulated release is subject to the Toxic Substances Control Act and any other federal requirement in the coordinated framework, both Departments shall be reviewing Departments and shall enter into a memorandum of understanding designating one of them to be the lead reviewing Department.