Can the proper Officer Cancel the Registration on his own?

Yes, in certain circumstances specified under section 29(2) of the CGST/SGST Act, the proper officer can cancel the registration on his own. Such circumstances include contravention of any of the prescribed provisions of the CGST Act or the rules made there under, not filing return by a composition dealer for three consecutive tax periods or non-furnishing of returns by a regular taxpayer for a continuous period of six months, and not commencing business within six months from the date of voluntary registration. However, before cancelling the registration, the proper officer has to follow the principles of natural justice. (proviso to Section 29(2)(e))