Doubt regarding substitute in ACM ICPC

As far as I know, Substitutes are not allowed at kanpur site. And they are allowed at all other regionals. Correct me if I am wrong anywhere in this post.
Now that my team is taking kanpur and amritapuri, can we take our substitute at amritapuri ?
They won’t disqualify us for mismatch in teams right ?
Is it allowed to add substitute in one regional and not adding it in another ?
What about online contest ? Can he be part of our team in online contest ?
Please reply if you have any idea. Also mention source of information along with you answer.
Thanks a lot.
@admin @vijju123 @taran_1407 @aryanc403 :stuck_out_tongue:

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