Amendment. Except as otherwise provided herein, no amendment of this Agreement shall be valid or effective, unless in writing and signed by or on behalf of the parties hereto.

Amendment. Except as otherwise provided herein, noNo amendment ofto this Agreement shall be valid or effective, unless such amendment is in writing and is signed by or on behalfauthorized representatives of all the parties hereto.to this Agreement.

Amendment. Except as otherwise provided herein, noAmendments. No amendment or modification of this Agreement shallwill be valid or effective,deemed effective unless made in writing and signed by or on behalf of the parties hereto.

Amendment. Except as otherwise provided herein, noNo modification or amendment of this Agreement shall be valid or effective, unless in writing and signed by or on behalf of the parties hereto.

Amendment. Except as otherwise provided herein, noNo amendment or modification of this Agreement shall be valid or effective,effective unless it shall be in writing and signed by or on behalfeach of the parties hereto.hereto, and no waiver or consent hereunder shall be effective against any party unless it shall be in writing and signed by such party.

Amendment. Except as otherwise provided herein, no amendmentNo amendment, modification or supplement of any provision of this Agreement shall be valid or effective,effective unless made in writing and signed by or on behalfa duly authorized representative of the parties hereto.each Party.

Amendment. Except as otherwise provided herein, noAmendments. No amendment or modification of this Agreement shall be valideffective or effective,binding with respect to a party unless it is in writing and is signed by or on behalf of the parties hereto.party.

Amendment. Except as otherwise provided herein, noNo amendment or alteration of the terms of this Agreement shall be valid or effective, unless made in writing and signed by or on behalfboth of the parties hereto.

Amendment. Except as otherwise provided herein, noNo amendment or modification of the terms or conditions of this Agreement shall be valid or effective, unless in writing and signed by or on behalf of the parties hereto.

Amendment. Except as otherwise provided herein, noAmendments. No amendment of any provision of this Agreement shall be valid or effective, unless the same shall be in writing and signed by or on behalf of the parties hereto.writing.