Just so nobody here has a problem .... just found this on the DMSB site...
As of 2003, not only regular licenses require a doctor's OK - in order to get a day or event licence, you have to have a form filled out from your doctor to apply...
see
http://www.dmsb.de/news/show.php?127 and
http://www.dmsb.de/news/data/news_127.pdf