Aggrieved person
Aggrieved person means any participant, beneficiary, plan administrator, contributing sponsor of a single-employer plan or member of such a contributing sponsor's controlled group, plan sponsor of a multiemployer plan, or employer that is adversely affected by an initial determination of PBGC with respect to a pension plan in which such person has an interest. The term beneficiary includes an alternate payee (within the meaning of section 206(d)(3)(K) of ERISA) under a qualified domestic relations order (within the meaning of section 206(d)(3)(B) of ERISA).