I might be missing something here, I have read through ORS4-1412 as well and understand all these ratings can be extended but the question is, if for example your MEP should have expired on 31st August, it has been extended to 22/11/20, if you take the revalidation proficiency check in September, will the examiner date the new expiry as 30/09/21 or 30/11/21 ?