578.7. Notwithstanding the expiry of the time limits provided for in section 1010, the Minister may, where the Minister obtains information according to which the condition in subparagraph c of the first or second paragraph of section 578.2 is not, or is no longer, satisfied, make under this Part, for any taxation year, such assessments or reassessments of tax, interest and penalties or such determinations or redeterminations as are necessary, (a) within three years after the day on which the Minister obtains the information; or
(b) within four years after the day referred to in paragraph a if, at the end of the taxation year concerned, the taxpayer is a mutual fund trust or a corporation other than a Canadian-controlled private corporation.