(1)When a government servant returns from leave on average pay, a further spell of leave on average pay should not, save in the most exceptional circumstances, be granted within three months of his return to duty if the two periods of leave on average pay combined would exceed the limits imposed by Fundamental Rule 81(b) or Subsidiary Rule 157(a) on the maximum amount of leave on average pay which may be taken at any one time. It is, however, left to the sanctioning authority to decide whether the circumstances of any particular case are exceptional or not. When any such leave is specially sanctioned, the sanctioning authority should record the reasons, and send a copy to the Accountant General.