Waging, or attempting to wage war, or abetting waging of war, against the Government of India is defined under section 121 of ipc. Provisions under IPC section 121 explained here:

What is Section 121 of IPC:

Whoever wages war against the Government of India, or attempts to wage such war, or abets the waging of such war, shall be punished with death, or imprisonment for life and shall also be liable to fine.

Illustrations

1. A joins an insurrection against the Government of India. A has committed the offence defined in this section.