(a) Power to remove trustee. A power in the grantor to remove, substitute, or add trustees (other than a power exercisable only upon limited conditions which do not exist during the taxable year, such as the death or resignation of, or breach of fiduciary duty by, an existing trustee) may prevent a trust from qualifying under section 674 (c) or (d). For example, if a grantor has an unrestricted power to remove an independent trustee and substitute any person including himself as trustee, the trust will not qualify under section 674 (c) or (d). On the other hand if the grantor's power to remove, substitute, or add trustees is limited so that its exercise could not alter the trust in a manner that would disqualify it under section 674 (c) or (d), as the case may be, the power itself does not disqualify the trust. Thus, for example, a power in the grantor to remove or discharge an independent trustee on the condition that he substitute another independent trustee will not prevent a trust from qualifying under section 674(c).

(b) Power to add beneficiaries. The exceptions described in section 674 (b) (5), (6), and (7), (c), and (d), are not applicable if any person has a power to add to the beneficiary or beneficiaries or to a class of beneficiaries designated to receive the income or corpus, except where the action is to provide for after-born or after-adopted children. This limitation does not apply to a power held by a beneficiary to substitute other beneficiaries to succeed to his interest in the trust (so that he would be an adverse party as to the exercise or nonexercise of that power). For example, the limitation does not apply to a power in a beneficiary of a nonspendthrift trust to assign his interest. Nor does the limitation apply to a power held by any person which would qualify as an exception under section 674(b)(3) (relating to testamentary powers).