"How to decide if something is true in a legal case about gangs"
When you have a question about facts in a legal case under this law, you need to know how to decide if something is true or not. This rule applies to cases that are part of this law, but not to cases where someone is accused of breaking this law.
To figure out if something is true, you need to think about what's more likely to have happened. If you think it's more likely that something did happen than that it didn't happen, then you can decide that it's true. This is called deciding "on the balance of probabilities".