Question:

In a closely fought match, a team is holding three close shots when its skip accidentally moves the jack a few centimetres without changing the scoring situation. What should be done?

Answer:

The opposing Skip must put the jack back to its former position. Law 38.1.3

 

Question:

As the players change over during a team game a small child (not a member of either team) wanders onto the rink and plays with the jack. What action must be taken and by whom?

Answer:

The jack has been disturbed by a neutral person. The Skips must, by agreement, put the jack back to its former position. If they are unable to agree, the end must be declared dead. Law 38.3.3