Which statement is True about the definitions regarding listed equipment and services?

The statement that listed equipment and services must meet or be tested for designated standards is accurate because the term "listed" typically refers to products or services that have been evaluated and approved by a recognized testing agency. These agencies establish safety standards and perform rigorous testing to ensure that the equipment or services meet specific criteria for performance, safety, and reliability.

This means that before any equipment or service can be labeled as "listed," they must undergo a thorough review and meet predetermined standards set forth by industry authorities. This ensures that the products are safe for use and function as intended, providing peace of mind to users and professionals in the field.

The other choices imply levels of scrutiny or safety assurance that do not align with the established protocols for listed equipment and services. For example, claiming that listed items do not need to meet standards contradicts the fundamental assurance that certification provides. Additionally, stating that they are automatically considered safe or require no inspection overlooks the due diligence required for any equipment used in safety-critical applications.