MAV is the Hungarian rail company (like FS in Italy, DB in Germany, or SNCF in France). Just as there are SNCF Boutiques in French cities, Budapest has a central MAV office, which Rick says is easier to use than the train stations. What Michael needs to know is, can you activate your rail pass without using up a day, or must you wait until the first day of use to activate it? This way, he can plan where is the most convenient time and place to activate it. He also needs to know if he can activate it at the MAV office (I'm guessing he can, but don't know for sure). If not, he needs to plan a separate trip to the station, or else arrive early at the train station on his first travel day. (Sorry, Michael, I don't know the answers myself. But I hope clarifying your issues helps others give you the answers).