What is the ATS duty upon receiving a new SIGMET concerning severe icing or severe turbulence in the sector?

1. Ensure the information is promptly available to affected aircraft, coordinate as required, and accommodate safe pilot-requested route or level deviations while maintaining separation.
2. File the message in a drawer and take no action.
3. Order all aircraft to land in open fields immediately.
4. Turn off the radio transmitter for 30 minutes.