As per previous trends,  forms for IMI and IMT will reopen again post CAT results. It will reopen for a frame of about two weeks, however this duration might vary like IMI might reopen it for two weeks whereas IMT might reopen only for a week.  Keep checking their official websites for the release of forms.
Also, they release ads in newspapers like TOI, THE HINDU, HINDUSTAN, etc. so you might get the latest update from there too.
About XIMB, I am sceptical and apprehensive that they do not reopen registration.
All the best!!

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