Law enforcement in Switzerland is mainly a responsibility of the 26 cantons of Switzerland, who each operate cantonal police agencies. Some cities also operate municipal police agencies as provided for by cantonal law. The federal government provides specialised services and is responsible for the protection of the Swiss border. Throughout Switzerland, the police may be reached by the emergency telephone number 1-1-7. Requirements The requirements to be an officer in Switzerland vary by canton, whose responsibility it is to institute the police service, some of the requirements include a complete high school education or 3 year vocational education, aged approximately 20–30 years of age, absence of a criminal record, completion of military service, a minimum height requirement, a Category B driver's licence, computer and keyboard literacy, foreign language skills, proper health and ocular health status, and Swiss citizenship. Law enforcement agencies Federal The federal government does not run a general purpose law enforcement agency. National-level law enforcement coordination is provided by a board of cantonal police commanders. The Federal Office of Police, an organisation belonging to the Federal Department of Justice and Police, coordinates international operations and may request cantonal police support for criminal investigations conducted under federal jurisdiction (such as with respect to organised crime, money laundering and terrorism). The Office's investigative arm is the Federal Criminal Police, which operates a small special operations unit, Task Force TIGRIS, whose existence was not made public until 2009. The Federal Department of Finance is responsible for the Swiss Border Guard Corps. The military of Switzerland, led by the Federal Department of Defence, Civil Protection and Sports, operates a professional military security service and a military police service. These services, as well as the armed forces in general, can be tasked to support the cantonal police forces in situations where civilian police resources are insufficient, such as catastrophes or large-scale unrest. In this case, the military serves under cantonal civilian responsibility and command. An actual Swiss Railway Police did not exist until the late 1990s. Prior to this, a number of train attendants were sworn in, equipped with a sidearm and ordered to provide security services in addition to their main duties. In the early 1990s, internal employees were recruited into a security force called Bahnpolizei (Bapo) or Railway Police, responsible for the safety on the S-Bahn, the public suburban railway network in Zurich. Its officers were equipped with a baton and