Such a unit must be ready for all possibilities – for operation in different facilities, also the ones located underground, therefore the policemen assume different situations, which might happen, and practise combat methods. The policemen, who are to serve in the counter-terrorist unit are selected very carefully. Their abilities are assessed by specialists in different fields. The policemen must pass psychological tests and go through accurate medical examinations. They are required to have exceptional psycho-physical predispositions, as anyone who would not meet such restrictive requirements could constitute a possible threat for his own colleagues in combat situations. The service in such units is done, among others, by specialists in hand to hand fights and climbing, frogmen, snipers, parachutists, pyrotechnicians and specially trained drivers. Their service consists in exercises for the most part. In the course of the service, the policemen are constantly verified – if any of the counter-terrorist soldiers stops meeting the specified criteria, he must give up the service of this type.

source: National Police Headquarters