規律とルール
規律は自発的に守られる行動基準や秩序を指しますが、ルールは外部から設定された行動基準で、強制力が伴う場合が多いです。
Discipline vs Rules: What’s the Difference? (Similar yet Different #085)
Discipline refers to a code of conduct or order that is voluntarily followed, whereas rules are standards of behavior imposed from the outside and are often coercive.