Can anyone please help?

With regards to the Release Medical, does anyone know if it can be taken before the 90 day period before tx date?

I am lucky enough to have secured a job, but with resettlement, leave and terminal leave I was hoping to hand my ID card 4 months before tx! Will I have to return to do the medical and release? I don't want to, I'm off to Oz!! That could be expensive and I'm not wanting to risk the new job!

Any help would be appreciated.