Concealing with intent to facilitate design to wage war.

Whoever by any act, or by any illegal omission, conceals the existence of a design to wage war against the Government of India, intending by such concealment to facilitate, or knowing it to be likely that such concealment will facilitate, the waging of such war, shall be punished with imprisonment of either description for a term which may extend to ten years, and shall also be liable to fine.

Section 149 of the Bharatiya Nyaya Sanhita  

Section 151 of the Bharatiya Nyaya Sanhita