Classification depends on the essential character of the belt. If the textile material provides the primary structural function, the belt falls under 5910. Conveyor belts where vulcanized rubber is the dominant material—with textile only as internal reinforcement—are generally classified in the rubber chapter. The ratio of textile to rubber and the structural role of each layer are the key factors; a binding ruling from CBP is advisable for composite constructions.

No—the heading expressly covers textile belts 'whether or not reinforced with metal or other material or coated or impregnated with plastics.' The presence of these additions does not change the classification as long as the textile substrate remains the essential structural element of the belt.