# Pipeline Safety Interpretation PI-82-0105

**Citation:** PI-82-0105  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 1982-06-30

PI-82-0105 concerning 192.457.

## Document text

<<<PAGE 1>>>

PI-82-0105
June 30, 1982
Mr. Dale W. Johansen
Assistant Director, Gas Department
Engineering Section
Missouri Public Service Commission
P.O. Box 360
Jefferson City, Missouri 65102
Dear Mr. Johansen:
We regret the delay in answering your letter about a compliance issue involving the Laclede Gas
Company.
As we understand your inquiry, it is whether Section 3(a)(1) of the Natural Gas Pipeline Safety
Act of 1968, as amended (49 USC 1672(a)(1)), permits retroactive application of the cathodic
protection standards in Subpart I of Part 192 to pipeline facilities in existence when the standards
were adopted.
Section 3(a)(1) provides that standards applying to emergency plans and procedures, extension,
operation, replacement, maintenance, subsequent inspection, or subsequent testing may be
applied to pipeline facilities in existence when the standards are adopted. With respect to
existing facilities (installed before August 1, 1971), Subpart I requires the determination of areas
of active corrosion and the application of cathodic protection to these areas and to any repaired or
replaced areas, with subsequent inspection and testing to ascertain whether the cathodic
protection is working properly. These requirements are examples of standards specifically
permitted by Section 3(a)(1) for replacement, maintenance, inspection, and testing of existing
pipeline facilities. They are not standards which would require modification of a pipeline's
design to achieve compliance; and we agree that such standards would be forbidden by Section
3(a)(1).
Sincerely,
Melvin A. Judah
Acting Associate Director for
Pipeline Safety Regulation
Materials Transportation Bureau

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/Pipeline/1982/g82-06-30_JOHANSEN_192.457-nlmx.pdf>
- Source ID: `phmsa`
- SHA-256: `dd604a8911f07f375a0896af5995e0802873a6833d6d12b3ea0280c51eca9bd3`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T20:16:28.838Z
- Document slug: `phmsa-interpretation-pi-82-0105`

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