# Definitions

**Citation:** 220 CMR 101.02  
**Type / status:** regulation / current  
**Agency:** Massachusetts Department of Public Utilities  
**Effective:** 2024-10-11  
**Published:** 2024-10-11

Except as otherwise specified in 220 CMR 101.00, all words are as defined in 49 CFR 192.3. Contractor. A person directly or indirectly contractually engaged with an operator to provide labor, materials, or equipment for the performance of Gas Work. Contractor includes any subcontractor or any third 

## Document text

Except as otherwise specified in 220 CMR 101.00, all words are as defined in 49 CFR 192.3. Contractor. A person directly or indirectly contractually engaged with an operator to provide labor, materials, or equipment for the performance of Gas Work. Contractor includes any subcontractor or any third party designated to provide services. Department. Department of Public Utilities, Commonwealth of Massachusetts. Division. Pipeline Safety Division of the Department. Gas Work. Any activity covered by applicable state and federal pipeline safety standards that the Department has the authority to enforce, including but not limited to the following: 220 CMR 99.00: Procedures for the Determination and Enforcement of Violations of Safety Codes Pertaining to Damage Prevention, 220 CMR 101.00 through 115.00, all federal pipeline safety standards as set forth in 49 CFR Part 192, and federal safety standards for liquefied natural gas (LNG) as set forth in 49 CFR Part 193. Hoop Stress. The tensile stress, usually in pounds per square inch gauge (psig), acting on the pipe along the circumferential direction of the pipe wall when the pipe contains gas or liquid under pressure. Pressure Limiting Station. Equipment that under abnormal conditions will act to reduce, restrict, or shut off the supply of gas flowing into a system to prevent the gas pressure from exceeding a predetermined value. Pressure Limiting Station includes pipe and auxiliary devices such as valves, control instruments, control lines, the enclosure, and ventilating equipment, installed in accordance with the pertinent requirements of 220 CMR 101.00. Pressure Regulating Station. Equipment installed for automatically reducing and regulating the gas pressure in the downstream pipeline, main, holder, pressure vessel or compressor station pipe to which it is connected. Pressure Regulating Station includes pipe and auxiliary devices such as valves, control instruments, control lines, the enclosure, and ventilation equipment. Underground Structure. A manmade facility, the majority or entirety of which is located below grade.

Uprating. Increasing the Maximum Allowable Operating Pressure (MAOP) of a pipeline in accordance with 49 CFR Part 192, Subpart K.

## Provenance

- Official: Yes
- Source: <https://www.mass.gov/doc/220-cmr-10100-1/download>
- Source ID: `ma-dpu-cmr`
- SHA-256: `8be583e9b69c4ad757d45c80bf78a5a707580e93f0b48c48b3fdde6f260b14f8`
- Retrieved: 2026-08-12T05:00:35.559Z
- Exported: 2026-08-23T06:41:49.979Z
- Document slug: `ma-cmr-220-101-02`

### Source metadata

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{
  "jurisdiction": "US-MA",
  "titleNumber": 220,
  "part": "101.00",
  "section": "101.02",
  "pipelineScope": "massachusetts-intrastate-natural-gas-pipeline-safety",
  "effectiveOn": "2024-10-11",
  "adoptedOn": "2024-09-26",
  "adoptionDocket": "D.P.U. 22-100",
  "registerNumber": 1532,
  "statutoryAuthority": "M.G.L. c. 164, §§ 66, 76, 76C, 105A, and 116B",
  "incorporatedFederalStandards": [
    "49 CFR Part 40",
    "49 CFR Part 192",
    "49 CFR Part 199"
  ],
  "references": [
    {
      "citation": "49 CFR 192.3",
      "referenceType": "federal-regulation-section",
      "url": "https://www.ecfr.gov/current/title-49/section-192.3"
    },
    {
      "citation": "49 CFR Part 192",
      "referenceType": "federal-regulation-part",
      "url": "https://www.ecfr.gov/current/title-49/part-192"
    },
    {
      "citation": "49 CFR Part 193",
      "referenceType": "federal-regulation-part",
      "url": "https://www.ecfr.gov/current/title-49/part-193"
    },
    {
      "citation": "220 CMR 101.00",
      "referenceType": "massachusetts-regulation",
      "url": "https://www.mass.gov/info-details/220-cmr-department-of-public-utilities"
    },
    {
      "citation": "220 CMR 99.00",
      "referenceType": "massachusetts-regulation",
      "url": "https://www.mass.gov/info-details/220-cmr-department-of-public-utilities"
    }
  ],
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  "applicabilityCaveat": "Applicability depends on Massachusetts intrastate jurisdiction, operator and facility status, the definitions and exceptions in 220 CMR 101.00, incorporated federal standards, Department waivers or orders, and section-specific transition periods. The Massachusetts Pipeline Safety Division does not regulate interstate pipelines or hazardous-material transportation by pipeline.",
  "publicationCaveat": "Mass.gov states that posted DPU regulations are informational copies rather than the legally official CMR edition. The official CMR is available through the Massachusetts State Bookstore; verify the official edition before legal reliance.",
  "rights": "Preserve Commonwealth provenance and source links. Public availability does not grant rights in seals, marks, third-party standards, or incorporated material; redistribution requires rights review.",
  "rightsReviewRequired": true,
  "region": "MA"
}
```