Approval to jail manual 2012 was provided at a meeting of the state cabinet presided by Chief Minister Nitish Kumar.
The new manual after notification would replace the existing one formulated in 1924, Inspector General of Police Prison Anand Kishore told reporters about the cabinet meeting.
The new guideline has provisions for computerisation of records including the works done by inmates.
Under the new manual, visitors to the jails would be registered through computer. Visitors complex would be established in all the jails where visitors' photographs would be taken on computer along with their fingerprints.
The jails would have elaborate computer generated details of inmates including their voice recordings.
Separate wards would be created in jails for inmates aged between 18 to 21 years to keep them away from hardcore criminals, the IG said.
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Close circuit cameras would be set up in jails to keep a tab over affairs inside including standard of food served to the inmates, he added.
Bihar has 56 jails at present that includes 8 central jails, 31 district jails and 17 sub-jails. These jails have capacity to house 33,119 prisoners.
The state Cabinet gave its nod to 35 proposals brought before it, official sources said.