Xbox One digital store help.

[MyCodenameIsIan]

I think it is in the terms of service that you need to have an account associated with the region that you use the system.

Theoretically you could have multiple accounts for each region with access to each of the digital game stores. Not sure if Microsoft employ any kind of IP blocking now as in Europe a few people found out that digital games were significantly cheaper on the Hungarian market price and started to exploit it.

In general, it seems to be tolerated as many people not in the tier one launch countries have imported the system although media services will likely be locked to their respective regions (EG: BBC to Uk and Hulu to USA).