# Geomagnetic Disturbance Reliability Standard; Reliability Standard for Transmission System Planned Performance for Geomagnetic Disturbance Events
> **Federal Energy Regulatory Commission** · Final rule. · Published 2018-11-26 · Effective 2019-01-25 · 83 FR 60347
## Document
- **Document number:** 2018-25678
- **Category:** electric-grid
- **Sub-agency:** Federal Energy Regulatory Commission
- **Federal Register citation:** 83 FR 60347
- **CFR reference:** 18 CFR 40
- **Publication date:** 2018-11-26
- **Effective date:** 2019-01-25
- **Energy docket:** Docket Nos. RM18-8-000 and RM15-11-003
## Abstract

The Federal Energy Regulatory Commission (Commission) approves Reliability Standard TPL-007-2 (Transmission System Planned Performance for Geomagnetic Disturbance Events). The North American Electric Reliability Corporation (NERC), the Commission-certified Electric Reliability Organization, submitted Reliability Standard TPL- 007-2 for Commission approval. The Commission also directs NERC to develop and submit modifications to Reliability Standard TPL-007-2: To require the development and implementation of corrective action plans to mitigate assessed supplemental GMD event vulnerabilities; and to authorize extensions of time to implement corrective action plans on a case-by-case basis. In addition, the Commission accepts the revised GMD research work plan submitted by NERC.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/11/26/2018-25678/geomagnetic-disturbance-reliability-standard-reliability-standard-for-transmission-system-planned)
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