115. Short periods of absence from duty owing to sickness are allowed on full pay, in accordance with the local rules of each Colony, without affecting vacation leave. 116. Subject to the necessities of the Service, leave of absence on half pay may be granted without any special grounds after three years’ resident service from first appointment in the Colony. It may be given after a less duration of service in cases of serious in- disposition, or of urgent private affairs, if the Governor is satisfied that the indulgence is indispensable. In cases of serious indisposition the state of the officer’s health must be certified by his medical attendant or, if required by the Governor, by a medical board. In cases of urgent private affairs the nature of such urgent affairs must be stated confidentially to the Governor. In Ceylon, however, four years’ resident service are required to qualify an officer for half-pay leave. In Hong Kong, ordinarily half-pay leave is only granted after four and a-half vears’ resident service. 117. In the absence of special grounds, half-pay leave must not exceed one-sixth of the officer’s resi- dent service in the Colony. On special grounds it may exceed that period by six months.* In the Straits Settlements, in special cases such as ill-health, urgent private affairs, or long residence in the tropics, half-pay leave may be allowed at the rate of one month in respect of each year of resident ser- vice, with an addition of six months. In British Guiana, Jamaica, and Trinidad the period of half-pay leave and vacation leave combined must Dot exceed six months at a time, except in special circumstances. Officers who have been continuously in the Colony for five years or more without leave may receive an additional two months on half pay. * See also Regulation 112 as to commutation of half-pay leave for full-pav leave.