Let us look a little more carefully at Ed's answer.
|Quote: Law 92B|
The right to request or appeal a Director's ruling expires 30 minutes after the official score has been made available for inspection, unless the sponsoring organisation has specified a different time period.
Note that this includes the words "right to request ... a Director's ruling".
So the Correction periods are in effect four.
One. Scoring, computation, tabulation and so on is covered by Law 79C.
Two. Scoring an event is covered by Law 81C6 and thus Law 79C.
Three. Asking for a ruling is covered by Law 92B.
Four. Appealing a ruling is covered by Law 92B.All
of these default to 30 minutes after the scores are published and made available unless the sponsoring organisation says otherwise.
- You agree on 2S +1 but put +110 on the score sheet
- The EBU scorer enters the score on the wrong side
- You decide to ask for a ruling at the end of the session when you realise what declarer really had!
- You got a ruling, discuss it with friends at the end who advise you to appeal, so you do
then you are in time to do so within 30 minutes of the scores being published, or whatever time the sponsoring organisation says.
Note that a sponsoring organisation can decide to make the various Correction Periods different lengths. For example, the Merseyside Bridge League says that for rulings the Correction period is 24 hours, but for appeals it is 48 hours. For leagues played privately this seems sensible to me.
Unfortunately most sponsoring organisations do not ever look at what Correction periods should be but then they default to 30 minutes after the scores are published.