# 255.931 Confirmatory direct assessment (CDA). **Citation:** 16 NYCRR 255.931 **Type / status:** regulation / current **Agency:** New York State Public Service Commission **Effective:** Not stated **Published:** Not stated Transmission and Distribution of Gas. An operator using the confirmatory direct assessment (CDA) method as allowed in section 255.937 of this Part must have a plan that meets the requirements of this section and of sections 255.925 (ECDA) and 255.927 of this Part (ICDA). An operator may only use CDA on a covered segment to identify damage resulting from external corrosion or internal corrosion. ## Document text An operator using the confirmatory direct assessment (CDA) method as allowed in section 255.937 of this Part must have a plan that meets the requirements of this section and of sections 255.925 (ECDA) and 255.927 of this Part (ICDA). An operator may only use CDA on a covered segment to identify damage resulting from external corrosion or internal corrosion. An operator's CDA plan for identifying external corrosion must comply with section 255.925 of this Part with the following exceptions. (1) The procedures for indirect examination may allow use of only one indirect examination tool suitable for the application. (2) The procedures for direct examination and remediation must provide that: (i) all immediate action indications must be excavated for each ECDA region; and (ii) at least one high risk indication that meets the criteria of scheduled action must be excavated in each ECDA region. An operator's CDA plan for identifying internal corrosion must comply with section 255.927 of this Part except that the plan's procedures for identifying locations for excavation may require excavation of only one high risk location in each ICDA region. If an assessment carried out under subdivision (b) or (c) of this section reveals any defect requiring remediation prior to the next scheduled assessment, the operator must schedule the next assessment in accordance with NACE SP 0502 (as described in section 10.3 of this Title), section 6.2 and 6.3. If the defect requires immediate remediation, then the operator must reduce pressure consistent with section 255.933 of this Part until the operator has completed reassessment using one of the assessment techniques allowed in section 255.937 of this Part. ## Provenance - Official: Yes - Source: - Source ID: `ny-dps-nycrr` - SHA-256: `e2d6282eeaa5b06ef96edc6e9a312604d73551efe6219411f0bf826cb0e21bb4` - Retrieved: 2026-08-12T06:20:40.894Z - Exported: 2026-08-25T18:26:08.977Z - Document slug: `ny-nycrr-255-931` ### Source metadata ```json { "jurisdiction": "US-NY", "title": 16, "part": "255", "partTitle": "Transmission and Distribution of Gas", "scopeKind": "gas-pipeline-safety", "tocPath": [ "Part 255 Transmission and Distribution of Gas", "Transmission Pipeline Integrity Management" ], "legalScope": "Complete current terminal legal unit exposed by the DPS-designated Title 16 NYCRR pipeline-safety part inventory.", "applicabilityCaveat": "Applicability depends on the part and section, Commission jurisdiction, commodity and facility type, intrastate or interstate status, operator and activity, exemptions, waivers, federal preemption, Commission orders, and incorporated law. DPS inspects portions of interstate systems for PHMSA, but PHMSA retains federal enforcement authority. DPS states that all jurisdictional Part 256 gas-holder and Part 257 LPG-plant facilities have been decommissioned even though those regulations remain unrepealed.", "incorporationCaveat": "These parts incorporate or rely on federal pipeline regulations, federal and New York statutes, Commission rules and orders, and privately authored technical standards. Part 10 supplies incorporation details. References metadata preserves explicit citations but does not reproduce external material, determine licensing rights, or decide whether a particular incorporation is static or dynamic.", "publicationCaveat": "The New York Department of Public Service identifies these eleven Title 16 NYCRR parts as its state pipeline-safety regulations and links to the public DOS/Westlaw NYCRR reading copy. That site labels the online text unofficial and directs users needing evidentiary accuracy to the Official NYCRR maintained by the Department of State Division of Administrative Rules. Each section's 'Current through' date is the most recent official NYCRR supplement covering that section, not a uniform corpus-wide amendment date.", "rights": "New York government-edict text is preserved with DPS, Department of State, and publisher attribution. The public reading site's presentation and enhancements, agency marks, forms, annotations, and incorporated federal or privately authored standards require separate rights review; this connector does not claim rights in those materials.", "rightsReviewRequired": true, "currentThrough": "2024-05-31", "historyEvents": "No event is emitted because the section reading copy does not supply an explicit adoption, filing, or effective-date history.", "publisherCitation": "16 CRR-NY 255.931", "identityAnomaly": null, "references": [ { "citation": "16 NYCRR 255.937", "referenceType": "new-york-administrative-code", "url": "https://govt.westlaw.com/nycrr/Document/I505dcf6dcd1711dda432a117e6e0f345?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)" }, { "citation": "16 NYCRR 255.925", "referenceType": "new-york-administrative-code", "url": "https://govt.westlaw.com/nycrr/Document/I505dcf5bcd1711dda432a117e6e0f345?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)" }, { "citation": "16 NYCRR 255.927", "referenceType": "new-york-administrative-code", "url": "https://govt.westlaw.com/nycrr/Document/I505dcf5ecd1711dda432a117e6e0f345?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)" }, { "citation": "16 NYCRR 10.3", "referenceType": "new-york-administrative-code", "url": "https://govt.westlaw.com/nycrr/Document/I50525ddbcd1711dda432a117e6e0f345?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)" }, { "citation": "16 NYCRR 255.933", "referenceType": "new-york-administrative-code", "url": "https://govt.westlaw.com/nycrr/Document/I505dcf67cd1711dda432a117e6e0f345?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)" } ], "region": "NY" } ```