# Chapter 421, § 2: Definitions **Citation:** 65-407 C.M.R. ch. 421, § 2 **Type / status:** regulation / current **Agency:** Maine Public Utilities Commission **Effective:** 2012-06-14 **Published:** 2012-06-14 For the purposes of this Chapter, the following terms have the following meanings. ## Document text For the purposes of this Chapter, the following terms have the following meanings. A. Combustible Material. “Combustible Materials” are materials which, if ignited, can burn at a temperature and for a period of time that could cause damage to an LPG container or distribution system. These include but are not limited to, fuels, stored building materials, and dead brush. “Combustible Materials” does not include live vegetation such as grass, shrubs, living trees, and seasonal vegetation. B. Corrosion. “Corrosion” is defined as a condition exhibiting signs of deterioration including pitting or loss of metal. Surface rust or light surface oxide as well as a loss of paint coating does not constitute atmospheric corrosion. C. Gas. “Gas” means petroleum gas as defined in §2 (K). D. Jurisdictional LPG System. “Jurisdictional LPG system” means any LPG pipeline facility that transports LPG, including propane pipelines that transport petroleum gas or petroleum gas/air mixtures from one or more LPG systems, with the exception of systems that serve: 1. Fewer than 10 customers, if no portion of the system is located in a public place; or 2. A single customer, if the system is located entirely on the customer's premises (no matter if a portion of the system is located in a public place. E. LPG. “LPG” means petroleum gas as defined in §2 (I). F. LPG Operator. “LPG Operator (or operator)”, means any person or entity that owns and engages in the transportation of LPG through a Jurisdictional LPG System or a person who is contracted to serve as the operator by a person who owns and engages in the transportation of LPG through a jurisdictional LPG system. G. LPG Supplier. “LPG Supplier” means a marketer who delivers liquefied petroleum gas to a storage tank which supplies an LPG distribution system. The LPG Supplier may or may not be the operator of the distribution system. H. Petroleum Gas. “Petroleum gas” means propane, propylene, butane, (normal butane or isobutanes), and butylene (including isomers), or mixtures composed predominantly of these gases, having a vapor pressure not exceeding 208 psi (1434 kPa) gage at 100 °F (38 °C). ## Provenance - Official: Yes - Source: - Source ID: `me-puc-pipeline-safety` - SHA-256: `61626934cac39159f2312e7396e1e93755f1a633a7c1cc68e72e51635a64faa0` - Retrieved: 2026-08-20T10:06:50.037Z - Exported: 2026-08-24T17:05:13.120Z - Document slug: `me-cmr-65-407-421-2` ### Source metadata ```json { "jurisdiction": "US-ME", "code": "65-407 C.M.R.", "chapter": "421", "section": "2", "corpusScope": "complete-current-chapters-420-and-421", "publicationObservedOn": "2026-08-20", "exactScope": "This bounded corpus contains the complete current operative text of all 10 top-level sections of 65-407 C.M.R. Chapter 420 and all 7 top-level sections of Chapter 421. Chapter 420 governs intrastate natural-gas and LNG pipeline operators; Chapter 421 separately governs jurisdictional LPG distribution systems within 49 C.F.R. Part 192.", "excludedScope": "Chapter 895 damage prevention, Chapters 130 and 140 reporting and mapping, gas accounting, rates, metering, customer protection, siting, environmental permits, statutes, dockets, orders, forms, federal text, interstate pipelines, hazardous-liquid pipelines, and private standards are not standalone searchable documents in this rules connector. Their exclusion does not imply legal irrelevance.", "applicabilityCaveat": "Maine's certified program covers intrastate gas pipeline operators, including covered natural-gas, LNG, and jurisdictional LPG facilities. Chapter 420 expressly excludes interstate natural-gas facilities and transportation. PHMSA retains gas interstate and gas/hazardous-liquid responsibilities not assumed by Maine; neither the MPUC program page nor PHMSA fact sheet establishes Maine hazardous-liquid certification.", "incorporationCaveat": "Chapter 420 dynamically incorporates amendments to 49 C.F.R. Parts 40, 190, 191, 192, 193, 198, and 199. Chapter 421 dynamically incorporates Parts 191 and 192 but fixes its NFPA 58 baseline to the 2004 edition with stated exceptions. This connector records those links without reproducing federal or private standards or deciding the legal effect of prospective incorporation.", "publicationCaveat": "The Maine Secretary of State warns that online rule copies are not certified copies for adjudicatory or evidentiary use. Chapter 420's controlling online copy is filing 2026-135, effective June 30, 2026; older MPUC gas pages that still identify the 2021 version are stale. Chapter 421's history says filing 2012-156 was filed May 15, 2010, an apparent source typo preserved rather than silently corrected. The PHMSA state page is corroborative program-scope evidence, not controlling Maine rule text.", "rightsCaveat": "Maine and federal government source artifacts are archived with attribution and SHA-256 provenance. Public availability does not settle rights in site presentation, seals, agency marks, forms, incorporated federal material, or private standards such as NFPA 58; downstream redistribution requires separate review.", "federalIncorporation": "dynamic-with-fixed-NFPA-58-2004-baseline", "references": [], "region": "ME" } ```