These Terms and Conditions can only be modified by a writing signed by an officer of Phone Hire. Specifically, they cannot be modified by any Phone Hire representative over the phone or by email. 13.2 The headings in these Terms and Conditions are for convenience of reference only and shall not affect the meaning or construction of the provisions contained herein. 13.3 No waiver by Phone Hire of any breach of these Terms and Conditions shall be considered as a waiver of any subsequent breach of the same or any other provision hereof. 13.4 Subscriber's rights and obligations under these Terms and Conditions cannot be assigned or transferred by Subscriber, nor can they be modified or waived except by written instrument signed by Phone Hire or its authorized agent. These Terms and Conditions constitute the entire agreement between Phone Hire and Subscriber; there are no other representations, conditions, warranties, guarantees, or collateral agreements, express or implied, statutory or otherwise, concerning the use or rental of the Equipment or the Service, other than as set forth herein. 13.5 If the performance of any part of these Terms and Conditions by Phone Hire is prevented, hindered, delayed or otherwise made impracticable by reason of any flood, riot, fire, judicial or governmental action, labor disputes, act of God, terrorist attack, or any other causes beyond the control of Phone Hire, Phone Hire shall be excused from performance to the extent that it is prevented, hindered or delayed by such causes. 13.6 Phone Hire