Final answer:
An individual supervising a Fuel-Oil transfer must hold a certificate of fitness, ensuring they have the necessary training to safely manage the transfer, with specific requirements varying by locality.
Step-by-step explanation:
The person supervising the Fuel-Oil transfer in a building from one floor to another is typically required to hold a specific certificate of fitness. This certification ensures that the individual has the necessary training and knowledge to safely manage the transfer process, which may include understanding the building's fuel system, spill containment measures, fire safety procedures, and emergency response protocols.
The exact type of certificate can vary depending on local regulations, but it is generally issued by a recognized authority or government body after the individual has successfully completed the required training and assessment.