Second PEB

I can't seem to find the answer to this anywhere. My husband has gone through a PEB once before a few years ago for a condition. He was found fit for duty. Nothing has changed, except that he was turned down for a deployment because of where they were going. They have now started another PEB for the same condition. Can they do that?
 
A new PEB can be started 6 months after the previous.
 
Ok thanks. Doesn’t seem right that they could potentially keep putting you through them until they get the answer they want. Thank you for the info!
 
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