Illustrative example
A delivery driver is badly hurt in a collision with a motorist who had spent the evening in a neighborhood bar. The family, now on one income, approach the bar owner, who says his staff poured an ordinary number of drinks for someone who seemed perfectly fine.
The section gives a right of action to a person injured in person, property or means of support against anyone who caused or contributed to the intoxication by unlawfully selling the liquor or unlawfully assisting in procuring it. The hinge word is "unlawfully": the complaint is not that the bar served the driver but that the sale itself was unlawful, service to a visibly intoxicated person being the classic instance. So it turns on the driver's visible condition at the time of the last sales, not on the number of drinks.
The bar's insurer and the family agree a contribution towards the lost income for the months the driver cannot work, without either side accepting or denying that the last sale was unlawful, and both keep the terms between themselves.