From neutral trade policy devices employed to identify country of origin of commodities, the rules of origin are emerging as protectionist tools. Nation states, as they are increasingly denied conventional trade policy tools, are reasserting themselves by evolving new and less visible weapons of intervention. The central objective of the harmonisation work programme of the WTO is to ensure that the rules of origin are employed without/or with least trade distorting effects. But, as this study shows, even if it is successfully completed, the HWP is likely to leave considerable scope for misuse of rules of origin for protectionist purpose.