Plan administrator liable in certain cases
(A) In general In the case of any plan to which this paragraph applies, paragraph (1) shall not apply and the plan administrator shall withhold, and be liable for, payment of the tax unless the plan administrator— (i) directs the payor to withhold such tax, and (ii) provides the payor with such information as the Secretary may require by regulations.
(B) Plans to which paragraph applies This paragraph applies to any plan described in, or which at any time has been determined to be described in— (i) section 401(a), (ii) section 403(a), (iii) section 301(d) of the Tax Reduction Act of 1975, or (iv) section 457(b) and which is maintained by an eligible employer described in section 457(e)(1)(A).