Final answer:
The OSHA standard requiring a 12 ft. air hose extension takes precedence over the Military Technical Manual's 10 ft. requirement for servicing multi-piece wheels, as OSHA is the authoritative body for occupational safety.
Step-by-step explanation:
The question pertains to workplace safety regulations and requires an understanding of the hierarchy of authority concerning safety standards. When there is a discrepancy between two safety standards, the principle is to follow the more stringent of the two, which in this case is the requirement set by the Occupational Safety and Health Administration (OSHA). The OSHA standard requires a 12 ft. air hose extension when servicing multi-piece (split-rim) wheels, as opposed to the 10 ft. requirement in the Military Technical Manual. In workplace safety, OSHA regulations generally take precedence over other guidelines, as they are the federal authority on occupational safety and health. Therefore, in a civilian context, the 12 ft. requirement by OSHA would be the one to adhere to for compliance and safety.