My question may have been lost in my congratulatory comments.
Will there be any way to tell which Pistol Accuracy while Standing SEAs are post-Pub 4 (and hence will work)?
(Is there a way to tell which LLC tapes are post-Pub 3?)
Before using and equipping? not really. If you put it in a socket and equip it, valid ones will add to the skill from your skill tree. Invalid ones will add a second line in your skill mods list.