The ultimate sanction - withdrawing the right to go in field service - is unprecedented as far as I (and other elders who I've asked) can tell.
Wasn't that always the case for people considered to be in "poor standing"? Maybe it varied by congregation or circuit.
Simon, below is my understanding... I am copying it from a post I made in another thread so that I don't have to re-type.
"I have never heard of this policy before in my time as a JW, and so it's a first as far as I know. You could always be a publisher, and it was often the first step on the road to baptism for a new person. You could continue on as a publisher in an unbaptized state for awhile, and just be classified as an unbaptized publisher.
However, as a baptized witness JWs were always expected to always engage in some form of publishing or have a share in the ministry every month, even if only an hour a month. Even if a person was on judicial reproof or restrictions and couldn't comment or have parts in the meetings, they could (and were expected to) always preach. This was actually many times used as a gauge of their progress to full spiritual recovery.
Only disfellowshipped persons did not qualify for the ministry, so this to me is quasi putting these persons in a similar light... almost disfellowshiped-lite, or another form of judicial punishment."