> The obvious explanation is that the cops/ambulances have a set of rules that take priority over the park's rules I prefer the following quote as an explanati

> The obvious explanation is that the cops/ambulances have a set of rules that take priority over the park's rules I prefer the following quote as an explanation: "There are no rules, only consequences." There are no consequences for an ambulance entering the park because everyone agrees it is right that it should do so.