This session will provide an opportunity to consider and discuss the many and varied issues that could prompt an ATM contingency situation. The session will focus on initial actions to be taken, ongoing contingency management, and transition back to normal operations, from the point of view of air traffic services providers and operators, and how these can be expedited using a contingency coordination team. The session will also address the ICAO requirements for appropriate ATS authority to ensure that a safety risk assessment is conducted for activities potentially hazardous to civil aircraft and that appropriate risk mitigation measures are implemented.