According to the Constitution of India, Part XI, Article 248(aa):
Residuary powers of legislation.—Parliament has exclusive power to make any law with respect to—
(aa)[prevention of other activities] directed towards disclaiming, questioning or disrupting the sovereignty and territorial integrity of India or bringing about cession of a part of the territory of India or secession of a part of the territory of India from the Union or causing insult to the Indian National Flag, the Indian National Anthem and this Constitution;
Under this provision of the constitution, the Indian government passed The Unlawful Activities (Prevention) Act, 1967 which states that something is unlaw activity if :
(i) which is intended, or supports any claim, to bring about, on any ground whatsoever, the cession of a part of the territory of India or the secession of a part of the territory of India from the Union, or which incites any individual or group of individuals to bring about such cession or secession;
(ii)which disclaims, questions, disrupts or is intended to disrupt the sovereignty and territorial integrity of India ;
so there is no chance for secession of any part of India whether you wish it or not....