New Delhi, July 16: Concerned over the growing incidence of child labour in the country, the National Commission for Protection of Child Rights (NCPCR) has directed state governments and various export promotion councils to set up self regulatory mechanism to check child labour from supply to export stage. India has the highest number of child labour, with reports estimating more than 200 million children working in different sectors, including more than 120 million engaged in hazardous work.