The Internal Revenue Service has released an analysis of three questions that could affect advisors and sponsors of defined benefit pension plans.

The guidance, given in IRS Revenue Ruling 2007-67, discusses definitions and special rules for purposes of calculations involving the minimum survivor annuities used in connection with defined benefit plans.

The revenue ruling deals with the interest rate selection rules that apply to annuities with starting dates occurring during plan years on or after Jan. 1, 2008.

The ruling also deals with the selection of mortality tables for distributions with annuity starting dates occurring during plan years that start on or after Jan. 1, 2008, and it deals with the possibility that an amendment that implements the new interest rates and mortality table might conflict with rules that generally prohibit a plan amendment that decreases a participant’s accrued benefit.

A copy of the revenue ruling is available