For each contract requiring or involving responsibility for work or operations at sites or facilities that support or perform essential directly support National Essential Functions Mission Essential Functions (MEF), Primary Mission Essential Functions (PMEF), or Essential Supporting Activities (ESA) the Contractor Requirements Document (CRD) DOE Order 150.1, Continuity Programs, sets forth the contractor responsibility for a Continuity of Operations (COOP) Program. This requires the contractor and its applicable subcontractors to conduct annual COOP awareness briefing for all its contractor workforce.