The Gesundheitsamt (local health authority) decides whether somebody is recognised as handicapped. For this purpose, the so-called “Grad der Behinderung (GdB)” (degree of disability) is determined. This numerical value says how severe the handicap is. According to this value , the “Schwerbehindertenausweils” (handicapped ID) is issued.
The handicapped ID contains information about the “Grad der Behinderung (GdB)” and the kind of handicap. If the “Grad der Behinderung (GdB)” is higher than 50, you are “schwerbehindert”, which means that your handicap is especially severe.
Under certain conditions and depending on the level of your handicap, you can use public transport for free (after paying a yearly fee of 80€) and get reductions for admission to events. It may also be, that you can take a person with you for free.
In order to get a Behindertenausweis” , you need to apply at the “Amt für Versorgung und Integration Bremen / Außenstelle Bremerhaven” (AVIB).