---
kind: "section"
citation: "49 C.F.R. § 604.18"
title: "49"
number: "604.18"
heading: "Request for an advisory opinion."
url: "https://uscodex.org/cfr/49/604.18"
---

# §604.18. Request for an advisory opinion.

- (a) An interested party may request an advisory opinion from the Chief Counsel only on matters involving specific factual events.
- (b) A request for an advisory opinion shall be submitted in the following form:
- (c) The Chief Counsel may request additional information, as necessary, from the party submitting the request for an advisory opinion.
- (d) A request for an advisory opinion may be denied if:
  - (1) The request contains incomplete information on which to base an informed advisory opinion;
  - (2) The Chief Counsel concludes that an advisory opinion cannot reasonably be given on the matter involved;
  - (3) The matter is adequately covered by a prior advisory opinion or a regulation; and
  - (4) **The Chief Counsel otherwise concludes that an advisory opinion would not be in the public interest.**

## Notes

### Authority

Authority: 49 U.S.C. 5323(d); 49 CFR 1.91.

### Source

Source: 73 FR 2345, Jan. 14, 2008, as amended at 90 FR 28213, July 1, 2025, unless otherwise noted.