you can convert exemption to non O and then ask extension based on "retirement" or marriage no ? I even was told by somebody that he converted exemption to non b and work permit which seems not possible to me I guess his employer did those steps without he even knew He works for a big international company
Non OA multiple can use nearly 2 years If you come back in 1 day before expires with 1 year insurance you will get stamped another year But in that case, if you want to go out, you need re entry permit because that stamp is single entry
You will need a new certificate of residence and new medical if you cannot do within 30 days That's what they told another guy when I was there last week ..