Civil Service Personnel Rules Rule 244

244. The pension benefit shall be calculated on completed years and the fractions of years shall be ignored. Provided that if the term of service is satisfactory in the cases of superannuation pension, invalid pension and compensation pension, the fractions of year:
(a) the head of service personnel organization may add up to six months;
(b) the head of the Ministry and the organization may add up to 12 months.