The costs incurred by the consultant are reimbursed by the company within fifteen days of the consultant`s duly written request for reimbursement. 1.3 The parties consider that it may be desirable to make changes to the declaration(s) of the work. Before carrying out work in connection with such an amendment, a written order of amendment must specify the necessary revisions to the declaration(s) of work and the parties agree in writing that such work constitutes a modification from the original description of the work as amended and that they continue to approve the amendments provided for in the terms of reference for the amendment. Each change order must be serial numbered and executed by Ms. Xxxxxx and (company name). .