The Reichskanzler (Imperial Chancellor)
The Chancellor of the Empire (Reichskanzler), appointed by the Emperor, presided in the Bundesrat (Federal Council), and supervised the conduct of its business. The Chancellor of the Empire had the right to delegate the power to represent him to any member of the Federal Council. (Article 15)
Decrees and ordinances of the Emperor required the counter-signature of the Chancellor to be valid (Article 17).
Read more about this topic: Constitution Of The German Empire