---
kind: "section"
citation: "29 C.F.R. § 4221.2"
title: "29"
number: "4221.2"
heading: "Definitions."
url: "https://uscodex.org/cfr/29/4221.2"
---

# §4221.2. Definitions.


The following terms are defined in [§ 4001.2](/cfr/29/4001.2.md) of this chapter: ERISA, IRS, multiemployer plan, PBGC, plan, and plan sponsor.

In addition, for purposes of this part:

Arbitrator means an individual or panel of individuals selected according to this part to decide a dispute concerning withdrawal liability.

Employer means an individual, partnership, corporation or other entity against which a plan sponsor has made a demand for payment of withdrawal liability pursuant to [section 4219(b)(1)](/cfr/29/4219.md?p=b-1) of ERISA.

Party or parties means the employer and the plan sponsor involved in a withdrawal liability dispute.

Withdrawal liability dispute means a dispute described in [§ 4221.1(a)](/cfr/29/4221.1.md?p=a) of this chapter.


## Notes

### Authority

Authority: 29 U.S.C. 1302(b)(3), 1401.

### Source

Source: 61 FR 34109, July 1, 1996, unless otherwise noted.