diff --git a/3.5.-pri-request=bikes_available.md b/3.5.-pri-request=bikes_available.md
index 2abccf8..6dfbe1a 100644
--- a/3.5.-pri-request=bikes_available.md
+++ b/3.5.-pri-request=bikes_available.md
@@ -23,7 +23,6 @@
 | uri_operator   | +        | text  | URI of Operator-Server                   |
 | lockit_ID      | +        | text  | bluetooth ID      |
 | lockit_GUID    | +        | text  | bluetooth GUID      |
-| authed         | +        | text  | if 1 then authenticated request on operator      |
 | rental_description  | + | object  | with tarif_elements and rental_info |
 | bike_type      | + | object  | describes the bike with some attributes |
 | smartlock_type      | o | object  | (under development) describes the smartlock with some attributes |
@@ -50,6 +49,14 @@
 | engine  | o | object |  contains engine attributes like "manufacturer" |
 | battery | o | object | contains smartlock battery attributes. |
 
+**bike_group** describes at which station defined in **station_group** the bike is allowed.
+Groups are identified by ID. The following groups of bicycles are defined:
+| groupID | bike type |
+| ------ | ------ |
+| 300101 | Cargobike |
+| 300103 | Citybike |
+Keep in mind, each ID is preceded by an operator-prefix.
+
 
 Example
 **REST request=bikes_available** for authorized users