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2. if your medical is about to expire ( i would say in less than a month) and you assume that your application is towards the completion. Then they would give you very less time to wrap up and land before your medicals expire, because although if you get your visa before the expiration of medicals you cant land on expired medicals - I was so glad that the Visa office called my husband to ask if he could land before DEc 17 ( Medical expiration date) or else according to them I would again have to apply for my husband..all the way from the beginning.
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Just to clarify this.
When the visa is issued, it is valid until either:
a) the medical results expire (that is one year after the medical exam was taken) or
b) the passport expires
Whichever of the above comes first.
Had your husband said he was unable to travel before Dec 17th, then the visa office would ask him to redo the medical exam. After he did that, they would issue a visa that would be valid until the second medical expired.
Sometimes they don't bother asking though. They either just issue the visa with a short expiration date or straight out ask to redo the medicals.
Had the visa been issued with the expiration date of Dec 17th and your husband had not landed by that date, then the visa would expire and yes, you would have to do the whole thing all over again.
Anyway, congratulations on the approval, hope he's with you soon!