When You are the stand-on boat. Which exception to the rules means you must give way?

As the stand-on vessel, you must give way if the other vessel is not able to safely avoid a collision, even if you have the right of way. This typically applies when the other vessel is constrained by its draft, or if it is a larger vessel that cannot maneuver easily. Additionally, if you are overtaking another vessel, you must also give way. Always prioritize safety and communication to prevent collisions.