The Central Movement Alert List (CMAL) is an electronic watch list, containing information about individuals who pose either an immigration or national security concern to the Australian Government as well as information on lost, stolen or fraudulent travel documents. CMAL comprises two databases, the Person Alert List (PAL) and the Document Alert List (DAL). The PAL database stores the biographical details of identities of concern and DAL is a list of lost, fraudulent or stolen travel documents. PAL records are categorised according to the reason for listing the identity—the alert reason code (ARC). There are 19 ARCs with each being categorised as high, medium or low risk. Australian Members of Parliament have expressed concerns about the lack of systematic control over data input and maintenance of the Alert List, stating that Australian citizens and visitors may suffer inconvenience or harassment due to misinformation or incorrect information being entered into the system. The Australian Border Force receives Passenger Name Record data from airlines operating into and out of Australia. PNR data is information about passengers that is held by airlines on their computer reservation system. PNR data includes approximately 106 different fields such as passenger name(s), sex, passport number, nationality, travel companions, frequent flyer Information, date and place of ticket issue, contact phone numbers, credit card number and expiry date, number of bags, seat allocation, and the passenger's full itinerary. The Australian Border Force has its own rank structure. Uniformed Australian Border Force officers have their rank displayed on their shoulder epaulettes, attached to shirts, jumpers or jacket. The rank and epaulette styling is in line with many other border agencies and shares close similarities with its United Kingdom counterpart, the Border Force. The ABF rank insignia's have four components placed against an ink navy coloured field:  Prior to the standing up of the Australian Border Force, the Australian Customs and Border Protection Service had Officers in certain operational instances where they were armed with Personal Defensive Equipment (PDE). These Officers were generally those that worked in Enforcement Operations, Investigations, and the Marine Unit. Since 1 July 2015, with the creation of the Australian Border Force came a change direction and environment. The ABF has geared itself more to a law enforcement aspect to help adapt itself with the increasing threat of terrorism, on both a global and local standpoint, people smuggling, and highly organised criminal syndicates and organisations. As a result, the ABF allows it officers to carry firearms and PDE at all major Australian international airports. ABF Officers are supplied with current generation Glock 17 9mm semi-automatic pistol.