My understanding is similar to what sir82 said. By 2000, the GB were given legal advice to rearrange the structure of the Watchtower Organization, because of the legal cases mounting against them. They could, if it came to the crunch, be legally responsible for any doctrinal aberration that was published by the WTBTS. [Similar to the "mentally diseased" absurdity of last year].
The advice was to relegate the position of Watchtower president to a largely ceremonial one, exacting no real power, while the real power remained behind in a nebulous, hermetically sealed body that was all but impenetrable to public scrutiny. This body was to be legally removed from the WTBTS, while at the same time invisibly still controlling the whole shebang.
Thus if any such legal action was taken, these men could always say: "Who us? Don't know wha' your'e talkin' about. We didn't write that stuff".
Even Don Adams who was "kicked upstairs" to keep this position warm could say, "Sorry mate, don't ask me, I don't write this stuff".
This stratagem worked, and now, anyone suing the Watchtower for anything, finds himself in a minefield of legal ambiguities that requires a mind numbing set of complexities to unravel.