The officers would need to assess whether the Ministerial Instructions (MIs) describe the applicant or not. For this, they would need to calculate the three-month period. To do this, they would need to count three months back from the last day in the three-month period.
- If the officers receive an application on October 30, 2014, then the three-month period commences on July 30, 3014
- If the officer is making a decision on January 10, 2015, then the three-month period commences on October 10, 2014
Source: Citizenship and Immigration