What must be done if the torch operator is involved with oxygen and fuel gas containers?

The requirement that the torch operator must be a Certificate of Fitness holder is essential due to the high risks associated with working with oxygen and fuel gas containers. The Certificate of Fitness is a designation that ensures the individual has undergone the necessary training and possesses the knowledge to safely handle hazardous materials, including the appropriate procedures for transporting, using, and storing these gases.

This certification signifies that the operator understands the potential dangers, such as combustion, explosion, and the need for proper ventilation, thereby ensuring compliance with safety regulations. Holding this certificate also reflects the operator's capability to respond effectively to emergencies and mitigate risks associated with torch operations.

Other options, while they may have merit in certain contexts, do not hold the same critical importance for ensuring safe operations with oxygen and fuel gas containers as the requirement for certification does.