Source is me.
We are conducting a SAR K9 Bayrisches Rotes Kreuz certification with official acceptance by the local city authorities. Dates as published. The published area is a standard training area appointed to us. According to https://wiki.openstreetmap.org/wiki/DE:Key:protection_title#Sonderfl%C3%A4chen 
Protection class 14 can (should) be used for this purpose.
If you have any objections to my approach, please approach me with your suggestions!
Greets Tom