Citizenship denotes the link between an individual and a state or an association of states. The status of the Citizen is not simply a formality; citizenship carries with it a range of rights and obligations to participate in the life of the state that is denied to those who are not citizens. The CAA, 2019 has been an issue of great controversy in recent times. This paper aims to reflect test the Act of 2019 on the ground of the grounds of reasonableness.

Keywords: Citizenship, Illegal immigrants; International border; Reasonableness; Proportionality; Equality; Secularism; Basic structure.