Congress leader Navjot Singh Sidhu surrendered before a court in Patiala on May 20 and will be serving his one-year sentence in the central jail.
In Patiala prison, Sidhu will not be earning wages for three months before he is classified as unskilled, semi-skilled or skilled.
While in prison, Sidhu will undergo training without pay for three months, according to the Punjab Jail Manual.
Earlier when Sidhu went to the court to surrender, some party leaders including Navtej Singh Cheema, Ashwani Sekhri, Hardial Singh Kamboj, Pirmal Singh and his supporters accompanied him.
But in jail, Sidhu will have to wear the mandatory white clothes of an inmate.