Pub. L. 93-406, tit. I, subtit. B, pt. 3, sec. 304
extension of amortization periods
extension of amortization periods Sec. 304. (a) The period of years required to amortize any unfunded liability (described in any clause of subsection (b)(2)(B) of section 302) of any plan may be extended by the Secretary for a period of time (not in excess of 10 years) if he determines that such extension would carry out the purposes of this Act and would provide adequate protection for participants under the plan and their beneficiaries and if he determines that the failure to permit such extension would— (1) result in— (A) a substantial risk to the voluntary continuation of the plan, or (B) a substantial curtailment of pension benefit levels or employee compensation, and (2) be adverse to the interests of plan participants in the aggregate. (b)(1) No amendment of the plan which increases the liabilities of the plan by reason of any increase in benefits, any change in the accrual of benefits, or any change in the rate at which benefits become nonforfeitable under the plan shall be adopted if a waiver under section 303(a) or an extension of time under subsection (a) of this section is in effect with respect to the plan, or if a plan amendment described in section 302(c)(8) has been made at any time in the preceding 12 months (24 months in the case of a multiemployer plan). If a plan is amended in violation of the preceding sentence, any such waiver, or extension of time, shall not apply to any plan year ending on or after the date on which such amendment is adopted. (2) Paragraph (1) shall not apply to any plan amendment which— (A) the Secretary determines to be reasonable and which provides for only de minimis increases in the liabilities of the plan. (B) only repeals an amendment described in section 302(c) (8), or (C) is required as a condition of qualification under part I of subchapter D, of chapter 1, of the Internal Revenue Code of 1954.