The German forces quickly consolidated their positions. They brought in infantry, established communications and anti-aircraft defences, established an air service with mainland France and rounded up British servicemen on leave.
The Germans organised their administration as part of the department of Manche, administered as part of military government Area A based in St. Germain. Feldkommandantur 515 was set up in Jersey, with a Nebenstelle in Guernsey (also covering Sark), an Aussenstelle in Alderney, and a logistics Zufuhrstelle in Granville. The Kommandant issued an order in Guernsey on 2 July 1940 and in Jersey on 8 July 1940 instructing that laws passed by the legislatures would have to be given assent by the Kommandant and that German orders were to be registered as legislation. The civil courts would continue in operation, but German military courts would try breaches of German law. At first the Bailiffs submitted legislation for the assent of the Kommandant signed in their capacities as Lieutenant Governors. At the end of 1941, the Kommandant objected to this style and subsequent legislation was submitted simply signed as Bailiff. The German authorities changed the Channel Island time zone from GMT to CET to bring the islands into line with continental Europe, and the rule of the road was also changed to driving on the right. Scrip (occupation money) was issued in Guernsey to keep the economy going. German military forces used their own scrip for payment of goods and services.