A concession must stand, once made, except that within the Correction Period established under Law 79C the Director shall cancel a concession:
- if a player conceded a trick his side had, in fact, won; or
- if a player has conceded a trick that could not be lost by any normal* play of the remaining cards.
The board is rescored with such trick awarded to his side.
* For the purposes of Laws 70 and 71, "normal" includes play that would be careless or inferior for the class of player involved.