The project office has created change request templates that must be used on any corporate project. Which of the following BEST describes this action?

A regulation is a rule or law prescribed by an authority, such as a government or regulatory body, often enforceable by law, which is different from an internal corporate requirement.

A best practice is a method or technique that has been generally accepted as superior to any alternatives because it produces consistently superior results, but it is not necessarily mandatory.

A guideline is a recommendation or suggestion that assists in decision-making or setting a course of action, but it is not a mandatory requirement.

A standard is a formal document that establishes uniform engineering or technical specifications, criteria, methods, processes, or practices that are mandatory to comply with. When templates "must be used," it signifies a standard.