The Supreme Court today directed the Karnataka government to allow the export of iron ore that has piled up in major ports of the state. The piling of iron ore occurred following the imposition of a ban on overseas shipments to check illegal mining. A bench of the court also directed the state government to notify a proposed new law to check illegal mining in the state by March 31. The bench further said if the state government does not bring the proposed law into force by the end of March, mining firms would be entitled to get interim relief.The Supreme Court direction came over a plea filed by mining firms challenging two orders of the state government banning the transportation of iron ore within the state and exports from ports.