Except as otherwise provided herein, this Agreement may not be modified, amended, supplemented or waived in any manner except in writing signed by the A.M. Castle Parties and the Required Consenting Creditors (which approval may be conveyed by counsel including by electronic email); provided , however , that (i) any modification of, or amendment or supplement to, Section 7(d) , this Section 16 or the definition of “Outside Date” shall require the written consent of all of the Parties, (ii) any modification of, or amendment or supplement to, the definition of “Required Consenting Creditors” shall require the written consent of all Consenting Creditors represented by Paul, Weiss, and SGF, and (iii) any modification, amendment, supplement or waiver that is materially adverse to any Consenting Creditor in a manner that is different or disproportionate in any material respect from the effect on any of the other Consenting Creditors (in their capacity as holders of A.M. Castle Claims/Interests) set forth in this Agreement (other than in proportion to the amount of such A.M. Castle Claims/Interests) shall require the prior written consent of such affected Consenting Creditor.