A more thorough explanation:

necessitate juris

necessitate juris means "by necessity of law" in Latin. It refers to actions that are required by law.

1. A judge may have to issue a warrant for someone's arrest if they have broken the law. This action is necessitate juris because it is required by law.

2. A company may have to provide safety equipment to its employees if the law requires it. This action is also necessitate juris because it is required by law.

These examples illustrate how necessitate juris refers to actions that are required by law. In both cases, the actions are necessary because they are mandated by legal rules.