So, I received response to the email I sent to Mexico VO.
My husband's medical expire until December 9, 2016, however he is being asked to get medical again, I sent an email, just confirming they have his medical, and it's not expired yet!!!
The answer was:
Please note that MEdical Examinations have a validity of one year. Therefore we require new MEDS for Mr XXXXXX
Once you comply, please send us proof to this e-mail. You can send receipt and or/report.
That is all I got, they did not answer my question, however, they did reply to my email, only 4 days after I sent it...