Final answer:
Fuel-servicing vehicles and equipment that are not in use must be inspected at least once every 7 days to ensure safety and identify any potential issues.
Step-by-step explanation:
The question pertains to the safety regulations and inspection frequency for fuel-servicing vehicles and equipment when they are not in active use. According to standard safety procedures and regulations, to mitigate risks of accidents or malfunctions, fuel-servicing vehicles and equipment should be inspected at least once every 7 days if they are not actively being used. This routine inspection is crucial for identifying any potential issues that could lead to hazardous situations.