What information is required on the sticker of the stacker type certification marks?

The correct answer emphasizes the importance of having a qualified number on the sticker of stacker type certification marks. This qualified number is essential as it serves as a unique identifier for the specific equipment and confirms that the stacker has undergone appropriate testing and met safety standards established by regulatory agencies. By providing a qualified number, it helps users and inspectors verify that the stacker is compliant with industry regulations, ensuring safe operation.

While other information like the model year, name of the manufacturer, and weight capacity can be important for various reasons, they are not essential elements required by certification marks. The model year can assist in identifying the age of the equipment, the manufacturer's name helps users recognize the brand's reputation, and the weight capacity informs users about how much weight the stacker can safely lift. However, the qualified number is the key aspect that links the equipment to its certification and safety compliance, making it critical for operational validity and safety monitoring.