[Mithadan]

Thingol, you are correct that UT has three versions of the story of Galadriel and Celeborn. Tar Elenion is also correct about Road Goes Ever On. This is a "canon" problem. When there are several versions of a single story, which one is correct? Which is the "final" version? One rule of thumb is to go by what was published during Tolkien's lifetime, which would mean that the Road Goes Ever On version trumps the others. Another rule of thumb is that the latest version is most likely to be correct. By that rule, one of the three UT versions is the "real" story. Either way we end up debating what JRRT really intended.

My view is that Galadriel, as a leader in the rebellion, by failing to accept the summons of the Valar and submit herself to judgment in the West subjected herself to a continuing ban on her return. In other words, she continued to act in rebellion and was subject to the penalty for her actions. For the reasons stated by Tar Elenion, the ban was ultimately lifted. This view most closely resembles one of the UT versions but also reconciles it with RGEO.