None.
You can also turn hotkeys on and off with ToggleHotkeys. If a hotkey contains this command, that hotkey will get triggered even when hotkeys are off.
You can use this command to enable hotkeys on the local machine like this:
<Hotkey F1> <SendPC Local> <TurnHotkeysOn>
You can also use it to enable hotkeys on a remote machine like this:
<Hotkey F1> <SendPC 192.168.1.108> <TurnHotkeysOn>
ToggleHotkeys TurnHotkeysOff