Nearly every state, including Maryland and California, has a law that allows parents to opt out of sex education classes for their children.

The UAE has a reservation - or opt out - to the Genocide Convention which has meant in previous cases, the ICJ does not have jurisdiction over these types of claims.

The Angels already had opted out of their lease, and they had in fact agreed to a one-year extension of the opt-out window.

While wealthier families can choose to opt out of a public school system with rapidly dwindling funding, not all students in the state can.

One proposal was giving tech companies automatic access to works such as books, films and TV shows to train AI models unless creators opted out.