Section 315 ILCS 20/21 - Statement of development area-Filing with Secretary of State(1) Not earlier than forty days and not later than sixty days from the date of the entry of the order approving a Development Plan, entered by the Redevelopment Commission pursuant to paragraph 2 of Section 18 of this Act, unless a judicial review of the order shall have been initiated pursuant to Section 19 of this Act, the Redevelopment Commission shall prepare and authenticate under its seal a statement that a certificate of convenience and necessity has been issued, pursuant to Section 18 of this Act, to the Neighborhood Redevelopment Corporation, identifying it by name. The statement shall contain an identification of the Development Area of the corporation by legal description and by description by city blocks, street and number, if any, thereof. The Redevelopment Commission shall forthwith thereafter file the statement in the office of the Secretary of State.(2) The provisions of paragraph 1 of this Section shall be applicable to the approval of an amendment to a Development Plan, made pursuant to Section 23 of this Act, when the amendment operates to extend the Development Area beyond its former limits.Laws 1941, vol. 1, p. 431.