Ah. Interestingly enough, it was two republicans that banned the CIA from performing assassinations of that sort. Gerald Ford after the Church Committee met in the middle of the 70s and Ronald Reagan reiterated it in his order to help facilitate cooperation between government agencies (namely the FBI with the CIA).
It wasn’t until after 9-11 that it was changed to “only in self-denfense.” Which I think is necessary. Before 9-11 and during the 90s this would have been taboo–unthinkable. Of course none of us can know if the CIA was following this order or not (it may have been just a cloak for them to hide under).