The tax-free period for a large investment project is the 10-year period beginning on the date chosen by the corporation or partnership.
The date selected must fall within the period beginning on the day on which the total investment expenditures attributable to the carrying out of the investment project first reach the investment expenditure threshold applicable to the project and ending on the last day of the 48-month investment period for the project.
The date selected will be indicated in the first annual certificate issued for the project.