# Reports of incidents; telephonic notice to the commission staff

**Citation:** Mich. Admin. Code R 460.20503  
**Type / status:** regulation / current  
**Agency:** Michigan Public Service Commission  
**Effective:** 2026-05-04  
**Published:** Not stated

Rule 503. (1) At the earliest practicable moment following discovery, an operator shall notify the commission staff of the following situations: (a) An incident that is reportable pursuant to 49 CFR 191.5, which is adopted by reference in R 460.20606. (b) An event resulting in estimated property dam

## Document text

Rule 503. (1) At the earliest practicable moment following discovery, an operator shall notify the commission staff of the following situations:

(a) An incident that is reportable pursuant to 49 CFR 191.5, which is adopted by reference in R 460.20606.

(b) An event resulting in estimated property damage of $25,000.00 or more including loss to the operator and others, or both, but excluding the cost of gas lost. As used in this subdivision, an <event= means on or relating to an operator's facilities that may or may not involve a release of gas.

(c) An event resulting in the loss of service to more than 100 customers.

(d) An event involving a customer's gas facility that results in a fatality or an explosion causing structural damage.

(e) An event resulting in an unintentional release of gas estimated by the operator to be 1 million cubic feet or more or an unintentional activation of an emergency shutdown system of a portion of a compressor station involving a release of gas.

(f) An event that causes the pressure of a portion of a pipeline system to rise above its maximum allowable operating pressure plus the build-up allowed for operation of pressure limiting or control devices.

(g) An event that receives or is likely to receive extensive news coverage or is significant in the judgment of the operator, even though it did not meet the criteria of subdivision (a), (b), (c), (d), (e) or (f) of this subrule. This subdivision is not subject to the penalty provisions of section 11 of 1969 PA 165, MCL 483.161.

(2) If additional information is received by the operator after the initial report that indicates a different cause, more serious injury, or more serious property damage than was initially reported, then the operator shall make a supplemental telephone report to the commission staff as soon as practicable.

(3) When requested by the commission staff, an operator shall supplement a report made in accordance with subrule (1) of this rule within a reasonable time, with a written report giving full details, such as the cause of the incident or occurrence, the extent of injuries or damage, and the steps taken, if any, to prevent a recurrence of the incident or occurrence.

History: 1998-2000 AACS; 2014 AACS; 2019 AACS; 2022 AACS; 2026 MR 9, Eff. May 4, 2026.

## Provenance

- Official: Yes
- Source: <https://ars.apps.lara.state.mi.us/AdminCode/DownloadAdminCodeFile?FileName=R%20460.20101%20to%20R%20460.20606.pdf>
- Source ID: `mi-ars-gas-safety`
- SHA-256: `8a530ad14ff16a99a63b4e547bb30e6e2548f38bfaaf18a59c047be1da79a100`
- Retrieved: 2026-08-20T08:33:06.234Z
- Exported: 2026-08-22T14:48:23.443Z
- Document slug: `mi-admin-code-r-460-20503`

### Source metadata

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  "partTitle": "RECORDS AND REPORTS",
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  "editionEffectiveOn": "2026-05-04",
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  "inventoryCount": 81,
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  "references": [
    {
      "citation": "49 CFR 191.5",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/section-191.5"
    },
    {
      "citation": "MCL 483.161",
      "referenceType": "michigan-compiled-law",
      "url": "https://www.legislature.mi.gov/Laws/MCL?objectName=mcl-483-161"
    },
    {
      "citation": "1969 PA 165",
      "referenceType": "michigan-public-act",
      "url": "https://www.legislature.mi.gov/Laws/SessionLaws"
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      "citation": "R 460.20606",
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  "federalReferences": [
    {
      "citation": "49 CFR 191.5",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/section-191.5"
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  "stateReferences": [
    {
      "citation": "MCL 483.161",
      "referenceType": "michigan-compiled-law",
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    {
      "citation": "1969 PA 165",
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      "url": "https://www.legislature.mi.gov/Laws/SessionLaws"
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  "scopeCaveat": "This connector is the complete current dedicated Michigan Administrative Code Gas Safety corpus published by ARS/MOAHR from R 460.20101 through R 460.20606. It does not claim all Michigan utility, siting, excavation-damage-prevention, well, environmental, federal, local, or Commission order law. Three headings expressly marked rescinded are retained only in the verified inventory. The MPSC pipeline-safety program does not regulate hazardous-liquid pipelines, and this corpus must not be used to imply that it does.",
  "applicabilityCaveat": "Applicability depends on the definitions and exclusions in R 460.20101 and R 460.20102, MPSC jurisdiction, gas and facility type, intrastate or interstate status, gathering-line classification, operator status, waivers, federal preemption, and rule-specific conditions. MPSC inspects jurisdictional intrastate gas systems and acts as an interstate agent for inspections and investigations; PHMSA retains interstate enforcement authority. MPSC expressly states that its pipeline-safety program lacks hazardous-liquid-pipeline jurisdiction.",
  "incorporationCaveat": "The rules adopt specified editions of 49 CFR parts 40, 191, 192, and 199 and named API, ASME, and NACE/ISO standards. References metadata does not reproduce incorporated material, update a fixed edition, determine whether a provision is superseded, or grant rights in third-party standards. Verify the exact edition and any Michigan additions, exceptions, or superseding language in the current official sources.",
  "publicationCaveat": "The rule text comes from the current ARS/MOAHR Michigan Administrative Code download. The MPSC identifies it as the 27th edition effective May 4, 2026. Historical Guide to the Michigan Gas Safety Standards files, including the 25th edition guide, are not current rule artifacts and are not used by this connector.",
  "rights": "Michigan administrative rule text is official legal material and is preserved with ARS/MOAHR and MPSC attribution. Public availability does not resolve rights in agency seals, site presentation, incorporated federal compilations, API, ASME, NACE/ISO standards, forms, or other third-party material; downstream redistribution requires separate rights review.",
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```