Steve....I think that he was being pressured to sign. I haven't heard of any such restriction for MEPS. My best advice at this point is to pressure his Recruiter to get him an MA slot when it becomes available. He should not be forced into something that he doesn't want. Secondly, he is not locked in to anything until he takes that final oath and can still withdraw. We just had another recruit go through a similar situation. He was pressured to sign for an MOS that he really didn't want. The Recruiter came through for him and was able to get him his requested slot when it opened up. Your Son is still in the driver's seat!!!

don't want to sound like a troll, but say your comment to Tom....

this was posted by a former Navy Chief in regards to something else, but the advice still holds:

To all who are having problems getting their childrens' recruiter to forward the ship/div info - IF the recruiter in charge does not handle it, you need to ask for the Zone Supervisor, if nothing happens there, the next one you should ask and speak to is the Assistant Chief Recruiter, then the Chief Recruiter. IF all that fails, then my next step would be to contact the Commanding Officer. I would wait no more than 1-2 days between contacts (ZS, ACR, CR).
I can tell you that the last thing a recruiter wants (or needs) is negative attention.

I just spoke to my daughter who reinforced my advice...."Choose your rate....Choose your fate"! He can push for the MA slot or withdraw at anytime before taking his final oath. The detailer at MEPS is trying to fill slots. Again....your Son is in the driver's seat! Only settle for what he wants!