A bill to amend the Internal Revenue Code of 1954 to provide interest rate assumptions in computing the unfunded vested benefits of a multiemployer plan, and for other purposes.

Amends the Internal Revenue Code to provide an interest rate assumption in computing the unfunded vested benefits of a multiemployer retirement plan. Specifies that such a plan shall assume an interest rate which is equal to the average yield to maturity on bills, bonds, and notes of the United States maturing during periods in which the liabilities for the benefits mature.