Yeah, that was my bad.
Just to make it clear - The 13th Guard is a TOP secret organization. Local government doesn't know about it. You're unclear as to whether national level government knows or not, but most probably don't. You're not authorized to know where their funding comes from (it could be funded by the Atlanteans or a drug trade for all you know).
You do know the stated goals, which are to achieve a world safe for normal and paranormal entities, preferably with as little bloodshed as possible (i.e. don't make the world safe by wiping out vamps). And in some way you should have some of those goals be your own for some reason (Vinom's character wants to make metas people again, that's a good reasoning, for example).
Protocol, since you are supposed to be covert, isn't as thorough a manual as a secret government might have, they're more like 'guidelines.' Just don't get caught, don't incriminate yourself, and work as a team towards the goal. That kind of stuff.
Parkham, Parkham, & Johnson is a world renowned Private Investigation firm specializing in the paranormal. They're well known enough that I need to add them to the setting thread soon. For your purposes, they aren't always given a lot of clearance, but most cops who know about their rep are willing to help since PP&J never takes credit for police work, they're the 'anonymous tip' type.