"He has time till first week of February to reply to the show cause notice. But, even if he does not reply to the notice, we will start the process of reducing his pension," a home ministry official said.
The official said that as part of the rules, the decision to reduce Rathore pension either fully or partly will be made in consultation with the Union public service commission.
"Following UPSC's opinion, we can go ahead with our decision," the official said.
The tainted former DGP was served with the show cause notice, questioning his behavior as an IPS officer, was served on Dec 26, 2009.
He was also served with a reminder on the same on Jan 19, 2010.
Rathore was convicted for the molestation of 14-year-old Ruchika Girhotra in 1990. Ruchika later committed suicide in 1993 after she was expelled form schools and false charges were leveled against her brother, Ashu Girhotra.