Actions against local governmental units – Intervention of Attorney General. In any action against a local governmental unit to recover expenditures alleged to be the responsibility of the governmental unit under Article VI of this Code, the Supervisor of General Assistance of such governmental unit shall notify the Illinois Department of the filing of the action. If the governmental unit was a recipient of State funds for public aid purposes during all or part of the period of the expenditures for which the action is brought, or if, as a result of the action, the governmental unit may qualify for and request State funds, the Attorney General shall be permitted to intervene and participate in the action in order to protect the State’s interest therein.