In the Artemis Fowl series, fairies are not allowed to enter a human home unless specifically invited to do so. The method of invitation can vary significantly, but it still exists.
In between Artemis Fowl: the Time Paradox and Artemis Fowl: the Lost Colony this rule
is eventually removed.
However, in Artemis Fowl: the Time Paradox, Holly and Artemis
go back in time, to a time before this restriction is in place.
Holly enters several human buildings, including the compound of the Extinctionists, without any permission.
It seems like this is a violation of Fairy Law at the time, but no mention of this is ever made. The same thing could be said of Opal.
Am I going crazy, did the limits not affect her because of the time travel, or is there something else I'm missing entirely?