49 CFR § 821.3 - Description of docket numbering system.

---
identifier: "/us/cfr/t49/s821.3"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 821.3 - Description of docket numbering system."
title_number: 49
title_name: "Transportation"
section_number: "821.3"
section_name: "Description of docket numbering system."
chapter_name: "NATIONAL TRANSPORTATION SAFETY BOARD"
part_number: "821"
part_name: "RULES OF PRACTICE IN AIR SAFETY PROCEEDINGS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 1101-1155, 44701-44723, 46301, Pub. L. 112-153, unless otherwise noted."
regulatory_source: "68 FR 22625, Apr. 29, 2003, unless otherwise noted."
cfr_part: "821"
---


# 821.3 Description of docket numbering system.

In addition to sequential numbering of cases as received, each case formally handled by the Board will receive a letter prefix. These letter prefixes reflect the case type: “SE” for safety enforcement (certificate suspension/revocation) cases; “SM” (safety medical) for cases involving denials of medical certification; “CD” for cases involving non-medical certificate denials; “SR” for cases involving safety registration issues under 49 U.S.C. 44101 *et seq.;* “CP” for cases involving the imposition of civil penalties; “NA” for cases in which a petition for review or appeal is not accepted because of a patent procedural deficiency; and “EAJA” for cases involving applications for fees and expenses under the Equal Access to Justice Act, governed by Part 826.