San Pedro is the largest prison in Bolivia and is renowned for being a society within itself. There are no guards inside the prison and police officers exclusively guard the outside of the prison only. Prisoners have to buy/rent the cells they live in, with a range of accomodation provided to them from worst to best. The families of prisoners are allowed to live with them, leaving and entering anytime they wish. Prisoners can earn money from working in the prison as messengers, hairdressers, shopkeepers and many more. The prison holds annual elections to elect a leader and executives, similar to a regular cabinet. The law in this ""society"" is made and enforced exclusively by the majority of the prisoners.