127.4. For the purposes of this division, in determining whether a person who is not resident in Canada is a controlled foreign affiliate of a corporation resident in Canada at any time, each settlor in respect of a trust, other than a non-discretionary trust, is deemed to own that proportion of the number of shares of a class of the capital stock of a corporation owned by the trust at that time that one is of the number of settlors in respect of the trust at that time.