(a) if an insurer’s taxation year does not begin on the first day of a calendar month and the insurer elects to have this paragraph apply for the year, the period beginning on the day in a calendar month that has the same calendar number as the particular day on which the taxation year began and endingi. on the day immediately before the day in the next calendar month that has the same calendar number as the particular day, or
ii. the last day of the next calendar month, if the next calendar month does not have a day that has the same calendar number as the particular day; and