Exactly the first three, you will not have to wait and you can use them consecutively, and then after that you have to wait 2 hours until you have another free go, and when you used that one up, you have to wait two hours to get your next one etc.
This is good. I wonder if they are going to do this in the next phases. Well, Lian’s sentence said “in the first phase...”, so I doubt it.