What legal considerations should be taken into account when taking a 17-year-old across state lines?

When taking a 17-year-old across state lines, legal considerations to take into account include obtaining parental consent, complying with any custody agreements or court orders, ensuring the minor has proper identification, and being aware of any state-specific laws regarding minors traveling alone. It is important to be aware of potential legal implications and to act in accordance with the law to avoid any legal issues.