The EU Regulations on medical devices and in vitro diagnostic medical devices MDR, IVDR1. Extension of MDR transitional period - 31 Dec 2027: class III, class IIb implantable - 31 Dec 2028: Other class IIb, class IIa, class I m/s 2. Extension of IVDR transitional period - 31 Dec 2027: devices covered by IVDD certificate and class D - 31 Dec 2028: class C - 31 Dec 2029: class B, c..