Whenever the South African Defence Force and any other force are associated together under one command, the provisions of this Act and the Military Discipline Code shall mutatis mutandis apply with reference to any act or omission on the part of a member of the South African Defence Force in respect of or in relation to the members or institutions of that other force in the same manner as if it were an act or omission on the part of that member in respect of or in relation to the members or institutions of the South African Defence Force.