Braunschweig can swim at the 100m Backstroke, because he swam the (very easy) Olympic Selection time in Berlin. He even fulfilled the FINA and the DSV standard in Würzburg last december, but I don't know if this was a FINA approved qualification meeting.
The difference between the Olympic Qualification Time and the Olympic Selection Time is only, that two starters from the same federation can only compete, if both have the OQT while only one starter from a federation with OST can participate. Theoretically speaking, if Braunschweig's time from december counts as FINA A-Standard, both he and Ulrich could compete in Tokyo at 100m backstroke.