He turned down my invitation saying that the elders had told him that he could not even talk to other disfellowshipped persons unless and until both he and they were reinstated!
This is a common requirement of the elders. In order for a DF person to "prove" they are repentant they cannot associate with "worldly" people or other DF persons. Associating with these people apparently is clear proof the person still likes the world and does not qualify for reinstatement. Of course they cannot associate with JWs either, so they are in a very real sense put into 'no man's' land.
It is yet another example of how WT controls a person's life, despite the fact that WT itself no longer even considers the DF person a JW. It is beyond absurd.
It means that if a DF person wants back into the Org. they cannot have any friends, not even acquaintances, in their life.