12.2 to 12.5

12.2  The Authority's Representative shall be entitled at any time, by notice to the Contractor, to authorise any other person to exercise the functions and powers of the Authority delegated to him pursuant to this clause, either generally or specifically. Any act of any such person shall, for the purposes of this Agreement, constitute an act of the Authority's Representative and all references to the Authority's Representative in this Agreement (apart from this clause) shall be taken as references to such person so far as they concern matters within the scope of such person's authority.

12.3  The Authority may by notice to the Contractor change the Authority's Representative.  The Authority shall (as far as practicable) consult with the Contractor prior to the appointment of any replacement for the Authority's Representative, taking account of the need for liaison and continuity in respect of the Project. Such change shall have effect on the date specified in the written notice (which date shall, other than in the case of emergency, be such date as will not cause material inconvenience to the Contractor in the execution of its obligations under this Agreement).

12.4  During any period when no Authority's Representative has been appointed (or when the Authority's Representative is unable through illness, incapacity or any other reason whatsoever to carry out or exercise his functions under this Agreement) the Authority shall carry out the functions which would otherwise be performed by the Authority's Representative.

12.5  

(a)  Save where notified in writing by the Authority before such act or instruction, the Contractor and Contractor's Representative shall be entitled to treat any act or instruction of the Authority's Representative which is authorised by this Agreement as being expressly authorised by the Authority and the Contractor and the Contractor's Representative shall not be required to determine whether authority has in fact been given.

(b)  Save where notified in writing by the Authority before such act or instruction, the Contractor and Contractor's Representative shall not be entitled to treat any act or instruction of the Authority's Representative or any other officer, employee or other person engaged by the Authority which is not authorised by this Agreement as being authorised by the Authority and shall be required to determine by notice to the Authority whether an express authority has in fact been given.