Part II Security of Tenure
General provisions
17 Adjustment for differences in lengths of rental periods.
In ascertaining for the purposes of this Part of this Act the weekly or other periodical equivalent of a registered rent, or of the annual amount mentioned in section 12(9) of this Act, a period of one month shall be treated as equivalent to one-twelfth of a year, and a period of a week as equivalent to one fifty-second of a year.