<Li> articles aimed at ensuring "fair competition"; members must not use environmental protection measures as a means of disguising protectionist policies . </Li> <Li> provisions permitting intervention in trade for economic reasons . </Li> <P> Exceptions to the MFN principle also allow for preferential treatment of developing countries, regional free trade areas and customs unions . </P> <P> The General Council has the following subsidiary bodies which oversee committees in different areas: </P>

When did india became a member of wto