Imperial law regarding the introduction of a German war and civil ensign

The Bundestag adopted them, and even Prussian King Frederick William IV wore such an armband on 22 March, when he promised that Prussia will become a part of Germany.

Still, constitutional historian Ernst Rudolf Huber explains, the flag law was absolutely valid legally.

[3] On 4 June 1849, at the Sea Battle of Heligoland, the commander of the then British island led the German ships be shot at for a warning.

[4] The German Bundestag, introducing the colours on 9 March 1848, but also the Central Power had forgotten to announce the new flag to foreign countries (with exception to the USA).

In May 1850 the US, the Netherlands (as a member of the German Confederation), Belgien, Sardinia, Turkey, Portugal, Naples, Spain, Greece and conditionally France had accepted the flag.