A file containing documents relating to quadripartite rights and responsibilities in Berlin. Subjects covered in the file include increasingly frequent and provocative patrols in West Berlin by the Soviet army; a Soviet patrol shadowing the motorcade of the West German president, Walter Scheel; a Soviet soldier tearing down a political poster whilst on patrol in West Berlin; and incursions by East German soldiers into the American sector of the city. Other subjects discussed in the file include delays in the development of a new district of East Berlin; the case of Nico Hübner, an East Berliner who refused to be conscripted for military service on the grounds of the demilitarised status of Greater Berlin; interventions on behalf of Hübner by a West Berlin politician, Peter Lorenz; and an incident in which two East Germans landed a small aeroplane at Gatow Airport in the British sector.