What is the most recent test documentation required for cargo tanks?

The most recent test documentation required for cargo tanks is the latest test results. This documentation serves as proof that the cargo tank has undergone necessary testing to ensure safety and compliance with established regulations. Regular testing is critical for maintaining the integrity of these tanks, as it verifies that they are capable of safely transporting compressed natural gas and that they meet the standards set forth by regulatory agencies.

These test results document the condition of the tank and confirm that it has not developed any faults or leaks since previous inspections. They are vital for ensuring that safety protocols are followed, as they provide updated information on the proper functioning of the tank, which is essential for the protection of drivers, the public, and the environment.

The other choices, while important in their own right, do not specifically pertain to the most recent verification of tank safety. Initial inspection reports are foundational documents that capture whether the tank met standards at the time of initial evaluation, but they become outdated. Annual maintenance records are important for tracking ongoing maintenance but do not reflect the latest testing status. Certification of compliance indicates that a tank meets regulations, but it does not inherently include the details of the most recent tests conducted. Thus, the latest test results are essential and specifically address the current safety status of cargo tanks.