Modifications. Neither this Agreement, nor any provision hereof, may be waived, amended or modified except pursuant to an agreement or agreements in writing entered into by the parties hereto.

Modifications. Neither this Agreement nor any provision hereof may be modified, altered, amended or waived except by an instrument in writing duly signed by both parties.

Modifications. Neither this Agreement nor any provision hereof may be modified, altered, amended or waived except by an instrument in writing duly signed by the party to be charged.

Waiver and Modification. The provisions of this Agreement may not be waived or modified unless such waiver or modification is in writing and signed by the parties hereto.

Amendments. This Agreement may not be amended, modified or waived as to any particular provision, except by a written instrument executed by the parties hereto.

This Agreement may not be amended, modified or waived as to any particular provision, except by a written instrument executed by the parties hereto.

Waivers and Amendments. This Agreement shall not be waived, amended or otherwise modified except in writing, duly executed by all of the parties hereto.

Modifications. No modification, amendment, supplement to or waiver of this Agreement shall be binding upon the parties hereto unless made in writing and duly signed by both parties.

Modifications and Amendments. This Agreement may not be, and shall not be construed to have been modified, amended, rescinded, canceled, or waived, in whole or in part, except if done so in writing and executed by the parties hereto.

Amendments. No provision of this Agreement may be waived or amended other than by an instrument in writing signed by both parties hereto.