@Tom *****
after the validity of the Non-OA has expired, the multi entry has expired, too. So in the second year, you need to buy re-entry permits for exiting and re-entering, to keep the last "admitted stay" alive. And also you need to prove health insurance for a complete duration of the stamped period of the last admitted stay stamp. If you cannot present the helath insurance upon re- entry, your admitted stay will be cut shorter (which shoukld not happen if you had the full period covered)