Hello, this is @cyan.devx. The solution for this would be to use Jurisdictions+ in conjunction with Ultimate Backup. You can configure different jurisdictions for each zone and assign each one to its respective agencies and units. For example, you can set Paleto Bay, LSIA, and Los Santos as different jurisdictions and assign each zone its corresponding units. Then, by configuring Ultimate Backup, you can have the backup units use the jurisdiction corresponding to the zone where the call originates. This way, LSPD units would primarily remain in Los Santos, Paleto Bay units in their zone, and Airport Police units around LSIA, preventing units from other agencies from appearing outside their assigned areas.