Which role concerns the inspector's legal responsibilities?

• A. Conform to NBIS
• B. Conform to OSHA
• C. Follow ISO standards
• D. Adhere to city planning codes only

Answer: (A)

The main concept is that a bridge inspector’s legal duties are defined by the National Bridge Inspection Standards. NBIS sets the binding rules for inspecting bridges on public highways, including who may inspect, how often inspections must occur, what methods and data must be used, and how findings are documented and reported to the Federal Highway Administration. Following NBIS ensures the inspection program meets federal legal requirements and maintains funding and accountability. Other options address different domains: workplace safety rules under OSHA, voluntary international guidelines under ISO, or local zoning and planning codes rather than the statutory framework for bridge inspections. Therefore, conform to NBIS is the correct answer.