S. Rept. 114-250: Critical Infrastructure Protection Act of 2015, Report of the Committee on Homeland Security and Governmental Affairs, United States Senate, to Accompany S. 1846 [open pdf - 303KB]
From the Purpose and Summary: "The purpose of S. 1846, the Critical Infrastructure Protection Act of 2015 (CIPA), is to require the United States Department of Homeland Security (DHS, or the Department) to develop, regularly update, and submit to Congress a strategy to protect critical infrastructure against threats of geomagnetic disturbance (GMD) and electromagnetic pulse (EMP) and, to the extent practicable, to perform research and development and incident response planning to mitigate the consequences of threats of EMP and GMD."
S. Rept. 114-250; Senate Report 114-250
Government Publishing Office: http://www.gpo.gov/