The JFBA and human rights groups have criticized the prison system, with its emphasis on strict discipline and obedience to numerous rules. Prison rules remained confidential. While the Prison Law Enforcement Regulation stipulates that the maximum time prisoners may be held in single cells is 6 months, activists claim that wardens continued to have broad leeway in enforcing punishments selectively, including "minor solitary confinement", which may be imposed for a minimum of 1 and not more than 60 days. Claims have also been made that prisoners were sometimes forced to kneel motionless in an empty cell for several hours at a time; however, foreigners and the handicapped were allowed to sit on a hard stool, at the discretion of the prison warden.