; (ii) for providing for the automatic enrollment of a participant in accordance with section 104; (iii) for enrolling a participant or beneficiary in a default investment fund or option in accordance with section 104; or (iv) for allowing a participant or beneficiary to invest through the mutual fund window or for establishing restrictions applicable to participants’ or beneficiaries’ ability to invest through the mutual fund window. (B) Joint and several liability A fiduciary shall be jointly and severally liable under paragraph (1) for a breach of fiduciary duty under subsection (b) by another fiduciary only if— (i) the fiduciary participates knowingly in, or knowingly undertakes to conceal, an act or omission of such other fiduciary, knowing such act or omission is such a breach; (ii) by the fiduciary’s failure to comply with subsection (b) in the administration of the fiduciary’s specific responsibilities which give rise to the fiduciary status, the fiduciary has enabled such other fiduciary to commit such a breach