Concrete Pipe & Products of Cal., Inc. v. Construction Laborers Pension Trust for Southern Cal.

*605Justice Souter

delivered the opinion of the Court.1

Respondent Construction Laborers Pension Trust for Southern California (Plan) is a multiemployer pension trust fund established under a Trust Agreement executed in 1962. Petitioner Concrete Pipe and Products of California, Inc. (Concrete Pipe), is an employer and former contributor to the Plan that withdrew from it and was assessed “withdrawal liability” under provisions of the Employee Retirement Income Security Act of 1974 (ERISA), 29 U. S. C. §§1301-1461 (1988 ed. and Supp. III), added by the Multiemployer Pension Plan Amendments Act of…