§ 2407 Subsequent remedial measures.

If someone gets hurt and the person or company responsible later fixes the problem or makes things safer, that fix generally can't be used as proof that they were careless or at fault in the first place. For example, if a store puts up a new warning sign after someone slips and falls, the injured person can't point to that new sign in court and say "see, they knew it was dangerous." The law wants people to feel free to make things safer without worrying that doing so will be used against them in a lawsuit.

There are some exceptions, though. This kind of evidence can still be used for other reasons. For example, it can be used to challenge a witness who is saying something untrue on the stand, or to prove who owned or controlled the property if that's actually being argued about. It can also be used to show that a safer option was possible, if the other side claims it wasn't.

In short, this rule protects people and businesses who try to fix hazards after an accident. It keeps their good actions from being twisted into an admission of guilt, while still allowing the evidence to be used fairly in certain limited situations.