25"2 FEDERAL POUTY application from one of the parties, by the Supreme Court of the German Reich unless another Court of the Reich is competent The President of the Reich carries out the decision of the Supreme Court. SECTION VI, ADMINISTRATION OF THE REICH, ARTICLE 78.—The conduct oŁ foreign affairs is the exclusive concern of the Reich. In affairs regulated by State legislation, tho States may conclude agreement with foreign States. Those agreements require the consent of the Reich. Conventions with foreign States as to tho alteration of the frontiers oŁ the Reich are concluded by the Reich, with the consent of the State concerned. Alterations in tho frontier may be effected only by a law of the Reich, excopt in the case of a simple rectification oŁ the borders of uninhabited portions of a district. In order to guarantee representation oŁ the interests of individual States arising from their special economic rela- tions with foreign States or their proximity thereto, the Reich undertakes the requisite arrangements and measures in agreement with the State concerned. ARTICLE 79.—The defence of the Reich is a matter for action by the Reich. The military organisation of the German people is regulated uniformly by means of a law of the Reich, regard being had to the individual conditions of each State, ABTICLE 80.—-Colonial affairs are exclusively tho busi- ness of the Reich. ARTICLE 81.—All German merchant shipping consti- tutes a united commercial fleet. ABTIOM 82.—Germany forms one customs and com* raereial district, enclosed by oae common customs frontier.