We also wanted to expand on what the PvP server ruleset means in The Old Republic. The obvious overarching rule is that in general, if you see a player of the opposite faction, you may immediately engage them in combat.
The exception to this rule is sanctuaries, which are large areas where PvP may not take place, regardless of whether you are flagged or unflagged for PvP. Examples of this are the Origin Worlds (Tython, Ord Mantell, Hutta, and Korriban), the Capital Worlds for both sides (Dromund Kaas and Coruscant), and the Republic/Imperial Fleets.”