What document must operators possess before operating a forward tipping dumper?

For operating a forward tipping dumper, possessing a valid CPCS card is essential because this card signifies that the operator has completed the necessary training and assessments required by the Construction Plant Competence Scheme (CPCS). The CPCS card ensures that the operator has the skills and knowledge to operate specific plant machinery, including forward tipping dumpers, safely and efficiently. This certification is specifically designed to validate the operator's competency in handling plant machinery within the construction industry.

While other documents like a driving license or insurance certificate may be relevant in certain contexts, they do not specifically pertain to the qualification needed for operating construction machinery. A safety training certificate can also be beneficial; however, it is the CPCS card that specifically validates an operator's capability and authority to operate a forward tipping dumper. Thus, having a valid CPCS card is imperative for compliance with safety standards and legal regulations in construction operations.