Amendments. This Agreement and each other Program Document may be amended from time to time, in writing and duly executed by the parties hereto.

Amendment. This Agreement may be amended or modified by written agreement executed by each of the parties hereto.

Amendments. This Agreement may be amended or modified at any time in any or all respects, but only by an instrument in writing executed by the parties hereto.

Amendment. This Agreement may be amended or modified only in writing signed by each party hereto.

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 This Agreement may be amended, modified or superseded only by a written instrument executed by both of the parties hereto.

Amendment. This Agreement may be amended, modified or supplemented but only in writing signed by each of the Parties hereto.

Modifications and Amendments. The terms and provisions of this Agreement may be modified or amended only by written agreement executed by the parties hereto.

Amendment. This Agreement may be amended, supplemented or modified only by a written instrument duly executed by or on behalf of each Party hereto.

AMENDMENT: Any amendment to this Agreement must be made in a writing that is duly executed by the parties hereto.

Amendment. This Agreement may be amended or modified only in writing signed by each party hereto.