46 U.S.C. § 6303: Rights of parties in interest

In an investigation conducted under this chapter, the following shall be allowed to be represented by counsel, to cross-examine witnesses, and to call witnesses:(1) an owner, (2) any holder of a license or certificate of registry, (3) any holder of a merchant mariner’s document, (4) any other person whose conduct is under investigation, and (5) any other party in interest.