Galactic Sapper wrote: It's not even questionable; attacks on occupied civilian structures are a violation of both the letter and the spirit of the Edict.
Even if the loss of life was low (as you state, but we do not really know), it is still a fact that the destroyed structures were occupied; just not at normal capacity. Civilian structures are not necessarily built with the same safeguards as military ones, since civilian contractors are more concerned about cost; so we have no idea how long it would take to evacuate them (they may be designed to be serviced by shuttles, with NO life pods). Therefore it cannot be true that it is a war crime to destroy a civilian structure with people in it (and so "occupied"), because that is what happened at Basilisk.
The "spirit" of an edict is the same sort of creature as an "unwritten rule" in a game. It does not formally exist and so is punished informally.