I am permanently PES BP.
~lol~
I called it!
FWIW I think the internal SOP is to convene a Medical Board. It's
certainly so for downgrading cases, though in your case you're
uniquely asking to be upgraded. But if you plan to sign on anyway,
they'll probably conduct another medical checkup for you - if only
for FFI purposes.
Not sure who's the authority now, if the MCC has apparently
decentralized things. Ask your MO as a 1st step. If it's not under
his jurisdiction, he'll know who to send your dockett to.