What is illegal regarding the sale of spirituous liquor?

The sale of spirituous liquor is illegal when it involves furnishing alcohol to a disorderly person. This is primarily because serving alcohol to individuals who are exhibiting disorderly conduct can lead to public safety issues, including increased risks of violence, disturbances, or unlawful behavior. Establishments that serve alcohol have a responsibility to monitor their patrons and ensure that alcohol is not provided to those who are likely to cause harm or engage in problematic behavior.

By maintaining this standard, the law not only protects the welfare of individuals but also helps maintain public order. It's crucial for liquor licensees to enforce this regulation and train their staff appropriately to identify and refuse service to individuals displaying such behavior. The other options represent scenarios that are permissible under the law, thus highlighting why furnishing to a disorderly person is specifically identified as illegal.