"You may give your arguments by using your intellect, you have the right to challenge it in the Supreme Court but citizenship act is the subject of Union List and not a state subject," he said after addressing a programme at a private university here.
Khan said people have a right to be adamant about their opinion but no right to go beyond the boundary of the law.
On Friday, the Kerala governor criticised the Left government for approaching the apex court against the CAA without informing him and said he may seek a report from it about the move.
Also on Friday, the Punjab Assembly adopted a resolution seeking immediate repeal of the law and Chief Minister Amarinder Singh said his government would approach the top court against it.
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