ISO 6683:2005 establishes the minimum performance requirements for restraint systems -- seat belts and their fastening elements (anchorages) -- on earth-moving machinery and specially designed forestry machines, necessary to restrain an operator or rider within a roll-over protective structure (ROPS) in the event of a machine roll-over (see ISO 3471), or within a tip-over protection structure (TOPS) in the event of a machine tip-over (see ISO 12117).
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