sentences:  The Federal Police was created as the main Federal Preventive Police in 1999 by the initiative of President Ernesto Zedillo (1994–2000) to prevent and combat and to enforce the law that drugs will not run around on Mexico's streets.The PF has been assuming its authority in stages over time, as its budget has grown and it has combined and reorganized police departments from major agencies such as those for migration, treasury, and highways.Many large bus stations and airports in Mexico are assigned a PF detachment.