517.5.7. A series of transactions that includes the disposition by an individual of eligible shares of a corporation (in this section referred to as the “particular corporation”) may not be considered to be an eligible business transfer of the individual where, after the disposition of the shares, the individual or the individual’s spouse is actively engaged in a qualified business carried on by the purchaser corporation, by the particular corporation or by a corporation in which the particular corporation has a substantial interest, unless(a) the active engagement of the individual or the individual’s spouse in that business for a particular period (in the second paragraph referred to as the “transition period”) aims to encourage the transfer of the knowledge possessed by the individual or the individual’s spouse in relation to that business for the benefit of other persons actively engaged in that business;
(b) substantially all the income from the business in which the individual or the individual’s spouse is actively engaged is not derived from the sale, leasing, rental or development, as the case may be, of properties, or the rendering of services, similar to those of a business that, before the disposition of the shares, was carried on by the purchaser corporation, by the particular corporation or by a corporation in which the purchaser corporation or the particular corporation held a direct or indirect interest; or
(c) the active engagement of the individual or the individual’s spouse in that business stems from the sole fact that the person referred to in section 517.5.11 is unable to actively engage in that business due to an illness, a disability or the person’s death if the illness, disability or death begins or occurs after the disposition of the shares of the particular corporation.