What is a right of entry for inspectors regarding CNG systems?

Inspectors have the authority to enter CNG facilities for inspection purposes at any reasonable time. This allows them to conduct necessary evaluations to ensure compliance with safety regulations and operational standards. The term "reasonable time" implies that inspections should occur during normal operating hours or at a time that does not unduly disrupt facility operations. This access is crucial for ensuring that CNG systems are maintained properly and adhere to safety guidelines.

The other options imply restrictions that do not apply to the inspection process. For instance, requiring a warrant for entry might hinder timely inspections, while needing to schedule in advance could delay necessary evaluations. Allowing entry at all times without notice could lead to operational disturbances and is not practical or standard practice. Thus, the approach that inspectors may enter at any reasonable time strikes a balance between oversight and operational efficiency.