"New Treasury Department rules on using deferred annuities within target-date funds as part of a defined contribution plan shouldn't be viewed as excluding the department's consideration of other lifetime income options in those plans, said J. Mark Iwry, deputy assistant secretary for retirement and health policy.... Because guaranteed withdrawal benefit products are different from standard fixed or variable annuities, the Treasury Department and IRS must 'look at how they fit into qualified (DC) plans,' Mr. Iwry said."