The European Commission is planning another MIR 7.3.1 form update to make signature optional (as well as improvements in other remaining issues) which should be published soon somewhere in November. They have also extended the transition timeline for the mandatory implementation of the MIR 7.3.1 form for 4 months after the latest update (counting from the latest update to be published in November). They have already announced it on their EUROPA website PMSV reporting forms.