8.  All officers to follow the orders of the Central Board of Revenue.-

Al1 officers and persons, employed in the execution of this Ordinance, shall observe and follow the orders, instructions and directions of the Central Board of Revenue:

Provided that no such orders, instructions or directions shall be given so as to interfere with the discretion of the Appellate Additional Commissioner in the exercise of his appellate functions or any valuer in the exercise of his functions under this Ordinance.