I am not part of HOG but seeing more of these in the Philippines. Can't find any description of what a Free Chapter is since they do have a Manila HOG Chapter.
Most HOG chapters are usually in AZ named either after the dealership that sponsors it or the area it is in. Ex: East Valley HOG, Superstition HD, etc.
If its an official HOG chapter, it has to be sponsored by a dealer. Since there is only one dealer in the Philippines, there is only one official HOG chapter.