It means exactly what it says. If someone wants to add a new API to the list of allowed APIs, and the API does not exist in Jolla’s repos, it has to be added to the repos first. Does that make sense to you?
Answering that question properly would require more time and energy than what I have right now. Hopefully someone else can answer. If not, I’ll try to give you an answer later.
Exactly - just what mr. Fordsworthe said 