plan amendment

In the case of a plan which the Secretary of Labor finds to be collectively bargained, established or maintained by an employer doing business in not less than 40 States and engaged in the trade or business of furnishing or selling services described in section 168(i)(10)(C), with respect to which the rates have been established or approved by a State or political subdivision thereof, by any agency or instrumentality of the United States, or by a public service or public utility commission or other similar body of any State or political subdivision thereof, and in the case of any employer which is a member of a controlled group with such employer, subparagraph (B) shall be applied by substituting for the words “plan amendment” the words “plan amendment or increase in benefits payable under title II of the Social Security Act”. For the purposes of this subparagraph, the term “controlled group” has the meaning provided by section 1563(a), determined without regard to section 1563(a)(4) and (e)(3)(C).