# Interruptions and Curtailments of Service

**Citation:** 4 CCR 723-4 Rule 4203  
**Type / status:** regulation / current  
**Agency:** Colorado Public Utilities Commission  
**Effective:** Not stated  
**Published:** Not stated

(a) A utility shall keep a record of all interruptions and curtailments of service on its entire system or on major divisions of its system, including a statement of the time, duration, and cause of each interruption or curtailment. A utility shall also keep a record of the time of starting up or sh

## Document text

(a) A utility shall keep a record of all interruptions and curtailments of service on its
entire system or on major divisions of its system, including a statement of the
time, duration, and cause of each interruption or curtailment. A utility shall also
keep a record of the time of starting up or shutting down of the compressing
equipment and the period of operation of all regulators used for the maintenance
of constant gas pressure.
(b) In its tariff a utility shall establish specific terms and conditions for interruptions
and curtailments of service. The utility shall establish, and adhere to, interruption
and curtailment priorities for sales service and for transportation service by
customer class. These priorities shall be consistent with the requirements of this
rule.
(c) A utility shall interrupt service within each class on an equitable basis, consistent
with system constraints and its tariff. A utility shall interrupt service within a locale
on a fair and reasonable basis, consistent with local conditions.
(d) A utility shall not make up any shortage by using the transportation customer’s
supplies without the transportation customer’s consent.
(e) A utility shall curtail standby supply service to transportation customers who have
contracted for standby supply service in accordance with the same system of
class-by-class priorities as is applicable to sales customers established by the
utility’s tariffs.
(f) A utility may provide, under applicable sales tariffs, available supply service to
gas transportation customers who have not purchased standby supply service
from the utility and are experiencing supply shortages.

## Provenance

- Official: Yes
- Source: <https://www.sos.state.co.us/CCR/DisplayRule.do?action=ruleinfo&ruleId=2260&deptID=18&agencyID=96&deptName=Department%20of%20Regulatory%20Agencies&agencyName=Public%20Utilities%20Commission&seriesNum=4%20CCR%20723-4>
- Source ID: `co-sos-ccr`
- SHA-256: `5d2b4e4e8c5918bb154c8b477f170fac6c36fcaa738ce2d45783a19ff9811222`
- Retrieved: 2026-08-12T04:36:48.096Z
- Exported: 2026-08-22T03:00:33.821Z
- Document slug: `co-ccr-4-723-4-4203`

### Source metadata

```json
{
  "jurisdiction": "US-CO",
  "code": "4 CCR 723-4",
  "ruleKey": "4203",
  "pipelineScope": "colorado-jurisdictional-gas-utilities",
  "legalScope": "Current 4 CCR 723-4 rules regulating Colorado jurisdictional gas utilities and gas master-meter operators, including construction, operation, system safety, gas infrastructure planning, metering, service, and enforcement provisions. This is an adjacent gas-utility corpus, not a replacement for the repealed dedicated 4900-series pipeline-safety rules.",
  "applicabilityCaveat": "Part 4 applies according to Colorado Public Utilities Commission jurisdiction and each rule's scope. The former dedicated pipeline-safety rules 4900 through 4975 are reserved after repeal; this connector does not represent them as current. Part 4 does not replace federal pipeline-safety requirements, determine whether a facility is interstate or intrastate, or resolve operator-specific orders, waivers, tariffs, or later rulemaking.",
  "references": [],
  "ruleInfoUrl": "https://www.sos.state.co.us/CCR/DisplayRule.do?action=ruleinfo&ruleId=2260&deptID=18&agencyID=96&deptName=Department%20of%20Regulatory%20Agencies&agencyName=Public%20Utilities%20Commission&seriesNum=4%20CCR%20723-4",
  "pucRulesUrl": "https://puc.colorado.gov/gasrulesandregulations",
  "ruleVersionId": "12549",
  "editionEffectiveOn": "2026-06-14",
  "publicationStatus": "The Colorado Secretary of State identifies the source as the official publication of state administrative rules. The edition date applies to the compiled rule version and is not represented as the effective date of every provision.",
  "rights": "Official state rule text is preserved with attribution and source links. Public accessibility does not imply rights in agency marks, third-party material, or incorporated standards; commercial redistribution requires review.",
  "region": "CO"
}
```