14 CFR 13.103 : Aeronautics And Space (§ 1.1 To Parts 1311-1399) — (§ 1.1 To Parts 50-59) — Federal Aviation Administration, Department Of Transportation (§ 1.1 To Parts 50-59) — Procedural Rules (§ 11.1 To Appendix A To Part 17) — Investigative And Enforcement Procedures (§ 13.1 To § 13.401) — Formal Fact-Finding Investigation Under An Order Of Investigation (§ 13.101 To § 13.131) — Order of investigation.

The order of investigation -

(a) Defines the scope of the investigation by describing the information sought in terms of its subject matter or its relevancy to specified FAA functions;

(b) Sets forth the form of the investigation which may be either by individual deposition or investigative proceeding or both; and

(c) Names the official who is authorized to conduct the investigation and serve as the Presiding Officer.