If you are a dog handler, you need to be able to control the dog and the GPS you put on the dog. In this case, you need to be the owner of a GPS, or you need to get admin rights to a GPS (given to you by the owner of the GPS).
As the owner of a GPS, you need a WeHunt GPS MAX subscription.
If you only have admin rights to the GPS, you need at least a WeHunt Premium subscription to be able to control the GPS.