29 CFR 4231.2 - Definitions.
In addition, for purposes of this part:
Actuarial valuation means a valuation of assets and liabilities performed by an enrolled actuary using the actuarial assumptions used for purposes of determining the charges and credits to the funding standard account under section 304 of ERISA and section 431 of the Code.
Certified change of collective bargaining representative means a change of collective bargaining representative certified under the Labor-Management Relations Act of 1947, as amended, or the Railway Labor Act, as amended.
Significantly affected plan means a plan that -
(3) Is created by a spinoff from another plan, or
(ii) With another plan that has so terminated.
Transfer and transfer of assets or liabilities mean a diminution of assets or liabilities with respect to one plan and the acquisition of these assets or the assumption of these liabilities by another plan or plans (including a plan that did not exist prior to the transfer). However, the shifting of assets or liabilities pursuant to a written reciprocity agreement between two multiemployer plans in which one plan assumes liabilities of another plan is not a transfer of assets or liabilities. In addition, the shifting of assets between several funding media used for a single plan (such as between trusts, between annuity contracts, or between trusts and annuity contracts) is not a transfer of assets or liabilities.
Unfunded accrued benefits means the excess of the present value of a plan's accrued benefits over the fair market value of its assets, determined on the basis of the actuarial valuation required under § 4231.5(b).