fred, on Jul 17 2009, 05:57 PM, said:
The basis of this "responsibility to the field" thing is IMO common sense. Maybe there is a legal basis as well - you would know better than me

If there is no legal basis, then TDs should not be awarding any sort of penalty. A TD awarding 'random' penalties and adjustments with no legal basis is more of a dereliction of duty than anything that's been mentioned here.
fred, on Jul 17 2009, 05:57 PM, said:
If your lawbook saws "no" then please use your brain instead (that was not intended as an insult - I know you are not one of those TDs who thinks the lawbook was given to Moses on Mount Sinai). If you ask your brain, it will tell you that the impact on the event of a pair constantly forgetting system would be exactly the same as that which would result from a pair who constantly makes frivolous psychs.
Correct me if I am wrong, but I am pretty sure the laws (commendably in my view) try to stop that from happening with respect to constant psychs and IMO they should do the same thing with respect to constant systems screwups (for all I know they do already).
Regardless of your opinion of what _should_ be in the laws, a TD can only rule what _is_ in the laws. Now, it may be separately useful to discuss what people think should be in the laws, but that's not the primary intent, AIUI, of this forum, which is to discuss how TDs should rule under the current laws.
The laws say very clearly L40A3 "A player may make any call or play without prior announcement, provided that such a call or play is not based on an undisclosed partnership understanding", L40C1 "A player may deviate from his side's announced understandings always provided that his partner has no more reason to be aware of the deviation than have the opponents", L40C2 "Other than the above no player has any obligation to disclose to opponents that he has deviated from his announnced methods", L75C "the partnership agreement is as explained ... the mistake was in South's call. Here there is no infraction of Law ... they have no claim to an accurate discription of the North-South hands".
So, forgetting your system per-se is not illegal and must not be punished by a TD.
fred, on Jul 17 2009, 05:57 PM, said:
Since forgetting your system is obviously legal and since it is obviously always going to happen on occasion to everyone, the question becomes where to draw the line in terms of how often it should be allowed without punishment and, when the line is crossed to various degrees, how severe the punishment should be.
There are some specific situations where you may be able to adjust, but they are not just "they forget a lot". Firstly if it is not clear what the correct agreement is L75C "the Director is to presume Mistake Explanation, rather than Mistaken Call in the absence of evidence to the contrary", which allows you to adjust under L21B3 if the other side would have got a better score if they had been properly informed (but note, not a PP). Secondly, if the specific cirmunstance comes up a lot then you may judge there to be a Concealed Partnership Understanding (L40C: "Repeated deveations lead to implicit understandings which then form part of the partnership's methods and must be disclosed ... If the Director judges there is undisclosed knowledge that has damaed the opponents he shall adjust the score and may award a procedural penalty"). The same adjustment can be made because that implicit agreement isn't legal to use in that event (L40B).
Matt