---
kind: "section"
citation: "49 C.F.R. § 33.31"
title: "49"
number: "33.31"
heading: "Priority ratings."
url: "https://uscodex.org/cfr/49/33.31"
---

# §33.31. Priority ratings.

- (a) **Levels of priority.**
  - (1) There are two levels of priority established by the Transportation Priorities and Allocations System regulations, identified by the rating symbols “DO” and “DX”.
  - (2) **All DO-rated orders have equal priority with each other and take precedence over unrated orders.** All DX-rated orders have equal priority with each other and take precedence over DO-rated orders and unrated orders. (For resolution of conflicts among rated orders of equal priority, see [§ 33.34(c)](/cfr/49/33.34.md?p=c).)
  - (3) In addition, a Directive regarding priority treatment for a given item issued by the resource agency with priorities jurisdiction for that item takes precedence over any DX-rated order, DO-rated order, or unrated order, as stipulated in the Directive. (For a full discussion of Directives, see [§ 33.62](/cfr/49/33.62.md).)
- (b) **Program identification symbols.** Program identification symbols indicate which approved program is being supported by a rated order. DOT will use the letter “T” followed by a number for all transportation-related approved programs. Programs may be approved under the procedures of Executive Order 13603 at any time. Program identification symbols, in themselves, do not connote any priority.
- (c) **Priority ratings.** A priority rating consists of the rating symbol—DO and DX—and the program identification symbol, such as DO-T1 or DX-T1 for a priority rating under TPAS.

## Notes

### Authority

Authority: Defense Production Act of 1950, as amended, 50 U.S.C. 82; 50 U.S.C. App. §§ 2061-2171; 50 U.S.C. App § 468; Executive Order 12742, (56 FR 1079, January 8, 1991); Executive Order 13603, (77 FR 16651, March 16, 2012).

### Source

Source: 77 FR 59801, Oct. 1, 2012, unless otherwise noted.