Amendments. This Agreement may not be amended, modified, altered or supplemented other than by means of a written instrument duly executed and delivered on behalf of the Purchaser and the Seller.

Amendment. This Agreement may not be amended, modified or supplemented except by a written instrument signed by Sellers and Purchaser.

This Agreement may not be amended or modified except by an instrument in writing signed by, or on behalf of, Purchaser and Seller.

Amendments. This Agreement may not be modified or amended except in a writing duly executed by the parties hereto.

Amendments. This Agreement may not be modified or amended except pursuant to a written instrument executed by all of the Parties.

Amendment. This Agreement may be amended, modified, or supplemented only by written agreement of Sellers and Purchaser.

Amendments. This Agreement and all documents and instruments executed in connection herewith or in furtherance hereof may not be amended, modified or supplemented, except by an instrument in writing signed by all Parties hereto.

Amendments. This Agreement cannot be amended, modified or changed in any way except by a written instrument executed by all Parties.

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.

Amendments. This Agreement may be amended, modified or superseded only by a written instrument executed by both of the parties hereto.