Amends and adds to existing law to provide for penalties, enforcement requirements, and affirmative defenses regarding child custody interference.

This legislation strengthens Idaho’s response to child custody interference by clarifying child custody interference as intentionally withholding a minor child from someone with lawful custody, visitation, or parental rights without authority. It refines defenses, adding a detailed exception for temporary, unavoidable delays in return that don't count as interference if a law enforcement officer reasonably accepts the explanation on scene. It establishes a graduated penalty framework that begins with infractions for first offenses and escalates to misdemeanors and felonies for repeat conduct. The language preserves court authority to award violator-paid location expenses and compensatory custody/visitation time under existing law.It directs law enforcement to respond to reports by verifying the child's location, conducting a welfare check, and filing a report.