Section 18

Every subordinate officer who continues in the Police Force after the completion of the period of service for which he was originally engaged shall, unless he re-engages for a further period in accordance with section 17, be deemed to be under engagement to serve from month to month; every such engagement after the first month’s service being held to commence on the first and to be determinable on the last day of each successive month.

No such officer shall resign from the Police Force unless he has given not less than one month’s notice in writing to the Commissioner or the commanding officer under whom he is serving, as the case may be.

The notice in writing shall be given on or before the first day of the month at the end of which such officer intends to resign.