how many times can you change an address with sky

[ellouwilt]

i am a uni student living in accommodation and so therefore i am going home for christmas but i still want to watch stuff on my sky stream puck but don't want to be charged for using it in a different address i am also moving back home for summer and then back to my uni town next year. 

i was just wondering if there is a limited amount of times i can change my address on my sky account or not. 

please let me know thank you x