This leaflet describes the procedures for testing air brakes on international trains at frontiers. The procedures for electropneumatic and electromagnetic brake tests are, until further notice, covered by bilateral agreements. The text specifies the type of test to be carried out in the event of various changes being made to the train consist. In addition to provisions stipulating how the tests are to be carried out, diagrams are provided illustrating the manual signals which the official in charge may use to convey the orders which must be given to the driver.