What is a person called who is legally responsible for something?

The term that best describes a person who is legally responsible for something is "Duty holder." This is a legal concept that often arises in various fields, including engineering, environmental law, and workplace safety. A duty holder is an individual or organization that has an obligation to ensure compliance with laws, regulations, and safety standards. This responsibility can encompass a wide range of duties, such as ensuring the safety of a work environment or maintaining equipment according to regulatory standards.

In legal and regulatory contexts, the duty holder is accountable for fulfilling these obligations and can face legal consequences if they fail to do so. This term emphasizes the importance of responsibility, accountability, and compliance in professional settings, thereby ensuring that safety and regulatory standards are met effectively.

The other terms may refer to individuals or roles in specific contexts but do not carry the same legal weight in terms of responsibility and obligation. For instance, a manager may oversee a team, but they may not personally bear legal responsibility. Similarly, while a contractor can have obligations within a contract, the term "duty holder" specifically refers to the individual or entity with legal accountability.