The BH - Begleithund is in two parts. The first obedience, the old shutzhund 1 routine minus dumbbells, and the second a traffic test. The test is designed to test the character of the dog and its sociability. The dog can not be aggressive or nervous.
The judge is a qualified IPo or Schutzhund judge - this is not like a kennel Club show judge but a bigger formal apprentice and testing for the individual before being able to asses the tests.