Commonwealth Consolidated Regulations Commonwealth Consolidated RegulationsIn these Regulations, a period expressed in months and dating from an event, ends:
(a) on the day, in the relevant subsequent month, which has the same number as the day of the event; or
(b) if the relevant subsequent month has no day with the same number -- on the last day of the month.
Note This provision displaces section 36 of the Acts Interpretation Act 1901 , and is in accordance with the Madrid Protocol. The difference between the two occurs when the initiating event is on the last day of a calendar month, which has fewer days than the month in which the period ends. For example, a period of 3 months from an event on 30 September ends on 30 December under this rule; it would end on 31 December under the Acts Interpretation Act 1901 provision.