quality:corruption, structural:summarization, quality:correction, stylistic:style_transfer, structural:reformatting
National Infrastructure Protection Plan

The National Infrastructure Protection Plan (NIPP) defines critical infrastructure sector in the US. Presidential Policy Directive 21 (PPD-21), issued in February 2013 entitled Critical Infrastructure Security and Resilience mandated an update to the NIPP. This revision of the plan established the following 16 critical infrastructure sectors: