gentlemen,
The original question was answered on the first reply. If TD's are that concerned about soft play, then they shouldn't allow brothers and sisters, or husbands and wives, or good friends to compete against each other. There is no way to enforce a penalty on a player, holding the nuts, when he doesn't raise, even when last to act. There are far too many variables to consider. The remaining players may be so low in chips that the player holding the nut hand might not want to eliminate them.
Mike, will you explain what the non-exclusive nuts in a one way game is?..... and..what the exclusive nuts in a high low split game is?
As far as I know, there is no RULE that covers this.