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NERC Submits Interpretation of Reliability Standard CIP-002-5.1a

On November 28, 2016, NERC submitted a petition for approval of a proposed interpretation of Reliability Standard CIP-002-5.1 (Cyber Security-BES Cyber Security Categorization). The proposed interpretation provides clarification regarding the meaning of the phrase “shared BES Cyber Systems” in Criterion 2.1 of Attachment to Reliability Standard CIP-002-5.1. The proposed interpretation provides that: (1) “shared BES Cyber Systems” refers to discrete BES Cyber Systems shared by multiple generation units, and (2) the evaluation as to whether a BES Cyber System is shared should be performed individually for each discrete BES Cyber System.  The proposed interpretation was adopted by the NERC Board of Trustees on November 2, 2016.

To view NERC’s petition, click here.