1.what rights should one have for doing commercial fishing in any country being a non resident of that place

Every country is not the same. Where?

Are you asking about International waters?

India...

india....

Without permits in place, you just can't take your commercial fishing vessel into india's waters. I doubt you will get permits.

How to get permit here? Am indian ctizen

india....

Without permits in place, you just can't take your commercial fishing vessel into india's waters. I doubt you will get permits.

This applies to any countries' protected waters.