94 STAT. 1228
11 USC 101.
Multiemployer plan, amendment procedures.
PUBLIC LAW 96-364—SEPT. 26, 1980
to contribute under the plan for the plan year in which such change arose reduced by the contributions made in such years by employers who had withdrawn from the plan in the year in which the change arose. "(3) An employer's proportional share of the unamortized amount of the plan's unfunded vested benefits for the last plan year ending before April 29, 1980, is the product of— "(A) such unamortized amount; multiplied by— "(B) a fraction— "(i) the numerator of which is the sum of all contributions required to be made by the employer under the plan for the most recent 5 plan years ending before April 29, 1980, and "(ii) the denominator of which is the sum of all contributions made for the most recent 5 plan years ending before April 29, 1980, by all employers— "(I) who had an obligation to contribute under the plan for the first plan year ending on or after such date, and "(II) who had not withdrawn from the plan before such date. "(4)(A) An employer's proportional share of the unamortized amount of the reallocated unfunded vested benefits is the sum of the employer's proportional shares of the unamortized amount of the reallocated unfunded vested benefits for each plan year ending before the plan year in which the employer withdrew from the plan. "(B) Except as otherwise provided in regulations prescribed by the corporation, the reallocated unfunded vested benefits for a plan year is the sum of— "(i) any amount which the plan sponsor determines in that plan year to be uncollectible for reasons arising out of cases or proceedings under title 11, United States Code, or similar proceedings. "(ii) any amount which the plan sponsor determines in that plan year will not be assessed as a result of the operation of section 4209, 4219(c)(1)(B), or section 4225 against an employer to whom a notice described in section 4219 has been sent, and "(iii) any amount which the plan sponsor determines to be uncollectible or unassessable in that plan year for other reasons under standards not inconsistent with regulations prescribed by the corporation. "(C) The unamortized amount of the reallocated unfunded vested benefits with respect to a plan year is the reallocated unfunded vested benefits for the plan year, reduced by 5 percent of such reallocated unfunded vested benefits for each succeeding plan year. "(D) An employer's proportional share of the unamortized amount of the reallocated unfunded vested benefits with respect to a plan year is the product of— "(i) the unamortized amount of the reallocated unfunded vested benefits (as of the end of the plan year preceding the plan year in which the employer withdraws); multiplied by "(ii) the fraction defined in paragraph (2)(E)(ii). "(c)(1) A multiemployer plan, other than a plan which primarily covers employees in the building and construction industry, may be amended to provide that the amount of unfunded vested benefits allocable to an employer that withdraws from the plan is an amount determined under paragraph (2), (3), (4), or (5) of this subsection, rather than under subsection (b) or (d). A plan described in section 42030t))(l)(B)(i) (relating to the building and construction industry)
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