This report was mandated by the important Critical Infrastructure Protection Act legislation (CIPA) passed into law in 2016. The legislation really didn’t accomplish anything else. complete responsibility was passed to the Department of Homeland Security (DHS)
This report was published twenty months after the legislation was passed in December 2016 and is a mere 16 pages. The complete guidance on defense of the grid is shown below. The full document can be seen at; https://www.dhs.gov/sites/default/files/publications/18_1009_EMP_GMD_Strategy-Non-Embargoed.pdf