Mani SHankar Aiyyar has already said that IHF is a independent body and the sports ministry has no control over it.
Gill is a vetran of the Punjab insurgency. You can rest assured he knows how to tackle politicians and the rest. About state associations, that might be a worry but then all of them(or most anyway) are die hard patrons of Gill anyway. Look what he did with teh VP of IHF, he offered to resign and he accepted that as that guy was known Gill hater

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Safin's Signature:

The reasonable man adapts himself to the world;
the unreasonable man persists in trying to adapt the world to himself.
Therefore, all progress depends on the unreasonable man.
- George Bernard Shaw