WAC required all werewolves to live openly under the sun. The "New Registration Act" was the werewolves' "household registration" and "social security," and every wizard could sense the contract. It also served as a unique identifying mark for registered werewolves.
It had an extremely overbearing function: if a werewolf harmed someone, the contract would immediately activate and alert WAC. Likewise, any wizard who killed a registered werewolf would also be marked by the contract.
Although WAC's leadership had yet to be elected and no measures had been introduced for dealing with marked wizards, WAC seats included members of the Wizengamot and the International Confederation of Wizards.
With those two organizations standing behind it, the deterrent was already sufficient.
This meant that werewolves who had not signed the "New Registration Act"—namely Greyback and his followers—had almost nowhere to hide in the magical world.
The reason was simple. On one hand, lacking the "New Registration Act" mark meant that you were unregulated and classified as an aberrant element.
On the other hand, an unknown individual had placed bounties across the black markets of the entire British Isles for the capture of unregistered werewolves!
In the face of Galleons, dark wizards had no principles.
By now, WAC had forced the activities of Greyback and the other unregistered werewolves to their limits. They scarcely dared to operate in magical communities any longer.
There was no need to consider desolate wildernesses where few people went; there were no such places near Greater London.
Areas densely populated by Muggles were theoretically unsuitable for werewolves with dark wizard identities to hide in as well. The Ministry of Magic had a magical incident monitoring system—there was similar technology at the Magical Congress of the United States called the Magic Exposure Level Clock, though it monitored magical exposure risks.