Sometimes a law is just on its face and unjust in its application.

The quote means a law may seem fair in its wording but be used unfairly in practice. Martin Luther King Jr. illustrated this with parade-permit rules: requiring a permit can be reasonable, but officials can apply the rule unjustly by denying permits for peaceful civil-rights marches. So the best answer is “by describing a law about parade permits.”

AI-written and checked against the verified answer.