https://www.cisa.gov/news/2020/04/17/cisa-releases-version-30-guidance-essential-critical-infrastructure-workers-during

CISA released version 3.0 of the Essential Critical Infrastructure Workers guidance to help state and local jurisdictions and the private sector identify and manage their essential workforce while responding to COVID-19. CISA’s original guidance was released on March 19, 2020 and version 2.0 was subsequently released on March 28, 2020.

CISA continues to work with our partners in the critical infrastructure community to understand what’s needed to keep essential functions and services up and running,” said Christopher Krebs, CISA Director. “Based on feedback we received, we released version 3.0 of the Essential Critical Infrastructure Workers Guidance, which provides clarity around a range of positions needed to support the essential functions laid out in earlier versions. As new or evolving challenges emerge, we are looking at what kind of access, personal protective equipment, and other resources workers need to continue performing essential duties in a safe and healthy way.