One of the articles they just agreed to, to be included in the coming contract, indicated 64 hours to be used within X time frame for moves, including Academy graduates reporting to their facility. HOWEVER, it did not indicate specifics or wording like "up to" so we'll have to wait to see the actual full text of the article.
Currently, there was a memo (attached below) sent out to all facilities encouraging the ATMs to work with Academy Graduates should they require more than a day to report and allow them to approve up to 64 hours excused time which will come out of your leave time.
Just saw the second part of your question. You begin earning annual leave when you start Academy.