280.13. A disposition of a common share of an eligible business corporation by an individual that, but for this section, would be a qualifying disposition of the individual is deemed not to be a qualifying disposition of the individual unless the eligible business of the corporation referred to in the definition of “eligible business corporation” in the first paragraph of section 280.5 was carried on primarily in Canada (a) at all times in the period that began at the time the individual last acquired the common share and ended at the time of disposition, if that period is less than 730 days; or
(b) in any other case, for at least 730 days in the period referred to in paragraph a.