say it again please?
what do you mean by "NOC apply to everyone"?
do you mean, is everyone who wants to change a sponsorship required to provide a NOC from the previous sponsor? if that's what you mean, i guess the answer is yes... except of maybe some very high "VIP" mates or so...even not sure...

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“You become responsible forever for what you have tamed”. Antoine de Saint-Exupéry