---
kind: "section"
citation: "43 C.F.R. § 3173.3"
title: "43"
number: "3173.3"
heading: "Oil measurement system components—seals."
url: "https://uscodex.org/cfr/43/3173.3"
---

# §3173.3. Oil measurement system components—seals.

- (a) Components used for quantity or quality determination of oil must be effectively sealed to indicate tampering, including, but not limited to, the following components of LACT meters (see [§ 3174.8(a)](/cfr/43/3174.8.md?p=a)) and CMSs (see [§ 3174.9(e)](/cfr/43/3174.9.md?p=e)):
  - (1) Sample probe;
  - (2) Sampler volume control;
  - (3) All valves on lines entering or leaving the sample container, excluding the safety pop-off valve (if so equipped). Each valve must be sealed in the open or closed position, as appropriate;
  - (4) Meter assembly, including the counter head and meter head;
  - (5) Temperature averager;
  - (6) LACT meters or CMS;
  - (7) Back pressure valve pressure adjustment downstream of the meter;
  - (8) Any drain valves in the system;
  - (9) Manual-sampling valves (if so equipped);
  - (10) Valves on diverter lines larger than 1 inch in nominal diameter;
  - (11) Right-angle drive;
  - (12) Totalizer; and
  - (13) **Prover connections.**
- (b) **Each missing or ineffectively sealed component is a separate violation.**

## Notes

### Authority

Authority: 25 U.S.C. 396d and 2107; 30 U.S.C. 189, 306, 359, and 1751; and 43 U.S.C. 1732(b), 1733, and 1740.

### Source

Source: 81 FR 81421, Nov. 17, 2016, unless otherwise noted.