The city shall succeed to the rights and powers of the park district in respect to agreements and permits relating to the Chicago Transit Authority under Section 7 of "An Act in relation to the creation, maintenance, operation and improvement of the Chicago Park District," approved July 10, 1933, as amended; provided that this Act shall not affect the validity of any right, privilege or permit granted by the park district to the Chicago Transit Authority under authority of said law.
70 ILCS 1545/18