reserve for post-retirement medical or life insurance benefits
(II)For purposes of subclause (I), the term “reserve for post-retirement medical or life insurance benefits” means the greater of the amount of assets set aside for purposes of post-retirement medical or life insurance benefits to be provided to covered employees as of the close of the last plan year ending before the date of the enactment of the Tax Reform Act of 1984 or on. (III)All payments during plan years ending on or after the date of the enactment of the Tax Reform Act of 1984 of post-retirement medical benefits or life insurance benefits shall be charged against the reserve referred to in subclause (II). Except to the extent provided in regulations prescribed by the Secretary, all plans of an employer shall be treated as 1 plan for purposes of the preceding sentence. (iii)This subparagraph shall not apply to any organization if substantially all of the contributions to such organization are made by employers who were exempt from tax under this chapter throughout the 5-taxable year period ending with the taxable year in which the contributions are made.