The police have also invoked 'Protection of children from sexual offences act', implemented in November 2012, as the victim is a minor.
The 13-year old girl was gang-raped by three men in Rawatsar area when she was returning home with her aunt on the night of December 27.
"We have prepared the charge-sheet and would submit it on January 3 in a lower court.
The government has also announced fast track court for rape cases and when the courts are notified, the case would be transferred," SP Barmer Rahul Barhat told PTI today.
"Acting swiftly, we nabbed two accused Manohar and Narendra within a few hours of the incident while the third identified as Shera Ram was arrested after some time," he said.
"It is the first case here when the charge sheet in rape case case will be submitted in such a short time," the officer claimed.
Deputy SP Najim Ali, Investigating officer, said that they have included appropriate section of 'Protection of children from sexual offences act which has the provision of rigorous imprisonment for life for the accused.
"We have prepared a strong charge-sheet and believe that this will set an example," Ali said.
The accused are in police custody at present.