This summary is not the rule. The rule text controls.
If someone is charged with a crime and plans to argue they were somewhere else when the crime happened, they need to follow a specific legal process. This defense is called an "alibi," and Idaho law requires the person to give advance notice that they plan to use it.
The details of how and when to give this notice are spelled out in Idaho Code § 19-519, a separate state law. That law explains things like deadlines for telling the prosecutor about the alibi and naming witnesses who can back it up. Skipping this step or missing the deadline can cause problems, including possibly not being allowed to present the alibi at trial.
If you're planning to use an alibi defense, it's a good idea to talk to a lawyer early. Getting the notice requirements right matters, and a lawyer can make sure everything is filed correctly and on time.