Yeah im not 100% sure on the subject but this is what I think sounds about right from doing a lot of research. If you want to control the boost it has to be done from inside the cabin, but you cant have any air, fluid or gas (apart from air vents) passing through the firewall.. So to stop all the smart arses placing their bleed valve inside the cabin haha, and I think this is Australia wide. Someone feel free to correct me as im not 100% sure..
If you do install it I would just change it back to stock for the inspection. Only a 5 minute job once you know what you're doing.
Not a Pulsar has a pretty good setup, could probably talk to him about how he controls his boost.