Ontario Moving to District Model in 2017

[Tem1514 Mentor]

I'm still reading about the District model but one of my main questions is;
How do you qualify for worlds.

I reading about wining points for each of the two district events then the highest teams go to a district championship. So does that mean only the winning alliance at the district champs get to go to the world champs?

What about the winning alliance at each district event, wild card slots and the list goes on?

Is there a more simple explanation somewhere as what will qualify a team for worlds?

Just as I had the regional model figured out something new. Time to learn some more.