I'm not sure. Text of card A can override general rules but it cannot override text of card B unless it makes direct reference to B.zarathustra wrote:8) Ben pointed out that the text of the minion site Carn Dum specifies "Special: Unless this site is a character's home site, a non-Orc, non-Troll character may not be brought into play at this site." He asked: "Do abilities (e.g. Witch-King, Khamul, They Ride Together, Black Horse, Uvatha) which allow the play of RW followers override Carn Dum, or is my most recent Bag End mission deck completely stuffed?"
These abilities do override Carn Dum, but since the Bag End mission is so slow, your deck is probably stuffed anyway.
E.g. A Chance Meeting makes direct reference to the Hobbits so it can override Hobbits limitations.