Law is the dictate of reason.

Explanation

Law is not the arbitrary will of the legislator but the product of right reason applied to the governance of human affairs — an enactment contrary to reason is no law at all.

Where this applies

• A regulation is issued that contradicts basic logic and reason.
• A law is challenged because it is purely arbitrary with no rational basis.

See also

• 1.5.1 Law is the highest reason, which commands what is useful and necessary, and forbids what is contrary thereto.
• 1.5.20 Reason is the soul of law; when the reason of the law changes, the law itself changes.