Questions about Region Locks

[KnightOfTruth]

Not to hijack but just for clarification, if Uplay games lock DLC on consoles, is that ALWAYS or just sometimes?

I was debating on getting Watchdogs DeadSec or just picking up our version over here (without any DLC grrrr...) and also getting the Black Chest version of AC4 both for the 360. My understanding is that I can play the games without using a UK gamertag or anything like that but that I may need a UK gamertag to redeem and access the DLC? Is that how it works?

Edit: Also, if I play the UK versions on my US 360 and CANT access the UK DLC, can I buy the US DLC and use it with the UK game? <brain explodes>

Thanks for the clarification oh wise ones!