"'What is the National Cyber Incident Response Plan (NCIRP)?' The NCIRP describes the various roles and responsibilities in cyber incidents of the Federal Government, the private sector, and SLTT [State, Local, Tribal, and Territorial] governments and how we will organize its activities to manage the effects of significant cyber incidents. The NCIRP, developed in accordance with Presidential Policy Directive (PPD) 41 on U.S. Cyber Incident Coordination, leverages doctrine from the National Preparedness System to articulate how the Nation responds to and recovers from cyber incidents. This alignment with the National Preparedness System also allows for cyber incident response to integrate seamlessly with physical incident response in cases where cyber incidents have physical impacts or vice versa."
U.S. CERT: https://www.us-cert.gov/