29.1. We have the right to revise and amend these terms and conditions from time to time.
29.2. You will be subject to the policies and terms and conditions in force at the time that you order services from us unless any change to those policies or these terms and conditions is required to be made by law or governmental authority (in which case it will apply to orders previously placed by you).
29.3. No variation of these terms and conditions shall be valid unless it is in writing and signed on our behalf.