ranks. Usually each District (regiment) has one or two platoons, consisting exclusively of former regular or conscript military police personnel. Norwegian MPs wear a red beret and a red lanyard around the left shoulder extending to the left front pocket. Only personnel currently serving as MPs are allowed to wear this. When on official duty, they also wear the MP armband, which is black with "MP" in red letters. It was previously worn on the right shoulder, but is now worn on the left shoulder, following NATO practice. They can also wear white webbing, or a number of items for special duties, like high visibility vests for traffic duty etc. Army canine units are also assigned to the MP battalion, but the personnel in such units are not necessarily MPs. Such personnel do not hold military police authority, and do not wear the MP insignia. Poland The military police of the Siły Zbrojne Rzeczypospolitej Polskiej is called Żandarmeria Wojskowa. Portugal In Portugal, each branch of the armed forces has its own military police force. The Portuguese Navy has the Polícia Naval (Naval Police), the Portuguese Army has the Polícia do Exército (Army Police), and the Portuguese Air Force has the Polícia Aérea (Air Police). The Air Police is an Arm of its own inside the Air Force, but the Army Police is only a speciality of the Cavalry Arm and the Naval Police is a speciality of the Marines. There is also the Republican National Guard (Portugal), a gendarmerie type police force, responsible for law enforcement in the countryside and small towns. Russia Until 2010 The Russian OMON and the military prosecution were operated as military police. On 2012 Ministry of Defense has established the VP which headed by a 1st deputy Minister. Sri Lanka Each of the Sri Lankan Armed Forces has its own military police/provost branch. The Sri Lanka Army is policed by the Sri Lanka Corps of Military Police and by Regimental Police who belong to each individual regiment or corps. The military police carry out the following missions: Maintenance of order and discipline: Consists of monitoring, maintaining and, if necessary, re-establishing discipline and military order. This also involves controlling stragglers and refugees in times of war and guarding and escorting prisoners of war. Security missions: Prevents and deters any threat to or attack against the personnel and property of the armed forces. MPs also provide VIP