(Here we go again... or maybe not, we'll see...)
If a mage dies, or passes into Eternal Twilight (aka Final Twilight), are they (their ghost, their "essence", their corpse, whatever) still protected by the Code? Specifically, regarding castiing spells on them, and magical Scrying that "peers into the affairs" of the past mage? Would their corporeal remains be protected as well, or differently? Would Tribunals even care to hear it, and if they did who would bring the case, and who would be awarded damages?
Or would it be one of those "technical" situations, where enforcement is winked at unless there are extenuating circumstances that invite harsher review and judgement.
On one hand, there are precedents that magi have an "existence" after death/twilight; but, on the other hand... ah, come on, gimme a break - they're dead!
There are many canon adventures or suggested plot threads that revolve around contacting past magi, either to force them to reveal secrets, or simply to plead a case and ask for their wisdom/aid/knowledge.
Here, specifically, this is in regard to summoning the ghost of a Praeco, who was (is?) a member of the Covenant where the Caster now resides. The Praeco, if s/he could be contacted, knows secrets and history about the Covenant that would be helpful to all concerned (tho' the "why" of the casting should not technically matter?). Even if a Rego spell is not used to "coerce" anyone/anything, a basic InMe to simply send a message to the ghost/spirt/whatever, via Arcane Connection, would normally (i.e., if the Praeco were alive) clearly be a breech of the Code. So...
This may well be (and I expect it is) one of those questions that has no "canon" answer, but is all opinion and IMS. So I welcome philosophical discussion, and additional questions. Thoughts?
(Also important is the question- how do you tell the diff between long-term ("years") and eternal twilight?)
(Twilight is discussed in many places, but the central rules start on p. 88.)