Civil Service Personnel Rules Rule 273

273. The retiree who is employed as a consultant:
(a) shall be entitled to the honorarium as prescribed in the contract at the end of every month;
(b) if the retiree is in receipt of pension, shall continue to enjoy that pension during the contract period;
(c) shall be entitled to weekend holidays, gazetted holidays and 10 days of casual leave and the earned leave at the rate 1/11 of the term of service within a calendar year with pay during the contract period. Any unused leave within such period shall be void;
(d) the proportionate honorarium shall be cut off for any absence from work except being on leave;
(e) shall be entitled to travelling allowances and daily subsistence allowances specified in the contract for the journey while of on duty;
(f) in the case of re-employment after retirement without break and the retiree has no chance to enjoy four months of preparatory leave for retirement, he shall be entitled to the lump sum pay for those four months.