4 But in the case of an officer transferred from one Colony to another, half salary from the Colony to which he is proceeding shall not begin while he is on leave from the Colony from which he is trans- ferred. 53. No advance of salary is allowed to officers either on first appointment or on leave of absence, except in special cases to be determined by the Secretary of State. Collateral security will be required when the advance exceeds a month’s salary. The security of another officer serving in the same Colony as the applicant will not be accepted. 54. If an office be vacant in a Colony for any reason other than the absence on full-pay leave of the holder, the person appointed by the Governor to act in that office shall be remunerated as follows :— (1) If the person appointed is not in the public service, he shall be remunerated at such rate, not exceeding the initial emoluments of the office, as the Governor may decide. (2) If he is the holder of another office, but is not performing the duties of it :— (a) If his emoluments in his substantive office are not less than the minimum emolu- ments of the office in which he is acting, he shall continue to receive the former. (b) If his emoluments in his substantive office are less than the minimum emoluments of the office in which he is acting, he may, while so acting, receive half the initial salary of the office in which he is acting, half the initial salary of his substantive office, all the increments he has earned in his substantive office, and any personal allowance to which he may be entitled, provided that he shall not receive in all more than the minimum emoluments of the office in which he is acting.