To assure the representation of interests arising from the special economic relations of individual States to foreign countries or from their proximity to foreign countries, the Commonwealth determines the requisite arrangements and measures in agreement with the States concerned.
ARTICLE 79
The national defence is a function of the Commonwealth. The organization of the German People for defence will be uniformly regulated by a national law with due consideration for the peculiarities of the people of the separate States.
ARTICLE 80
Colonial policy is exclusively a function of the Commonwealth.
ARTICLE 81
All German merchant ships constitute a unified merchant marine.
ARTICLE 82
Germany forms a customs and trade area surrounded by a common customs boundary.
The customs boundary is identical with the international boundary. At the seacoast the shore of the mainland and of the islands belonging to the national territory constitutes the customs boundary. Deviations may be made for the course of the customs boundary at the ocean and at other bodies of water.