(a) The following terms are defined in § 4001.2 of this chapter: Code, contributing sponsor, ERISA, IRS, notice of intent to terminate, PBGC, plan, plan administrator, plan year, single-employer plan, and termination date.

(b) For purposes of this part, the following terms are defined in § 4006.2 of this chapter: continuation plan, new plan, newly covered plan, participant, participant count, premium funding target, premium payment year short plan year, small plan, and UVB valuation date.