(4) A plan is not required to make retroactive benefit payments with respect to that portion of a benefit which was suspended under this subsection, except that the provisions of
section 1426(c)(4) and (5) of this title shall apply in the case of plans which are insolvent under paragraph (2)(A), in connection with the plan year during which such section 1341a(d) of this title first became applicable to the plan and every year thereafter, in the same manner and to the same extent as such provisions apply to insolvent plans in reorganization under
section 1426 of this title, in connection with insolvency years under such
section 1426 of this title.