India has managed to secure an exemption from the US on steel and aluminium tariffs, but with certain riders, said sources.That is seen as a big breakthrough for India, which was earlier upset with Washington that had refused to accede to the request.It's learnt that the US is willing to exempt a certain percentage of exports from India, which is pressing for a complete waiver of tariffs.The US administration, according to the sources, has already granted exemption to 4-5 countries on this front.In a related development, India has deferred the implementation of higher tariffs on some goods imported from the United States till November 3.New Delhi had decided to raise the import tax on 29 US products, including almonds, walnuts and apples, from August 4. The government later pushed back imposing the tax by 45 days. With the negotiations on, it has decided to put off the retaliatory tariffs again.The US had imposed import levies of 25 per cent and 10 per cent on steel and aluminium, respectively, on India in March.Meanwhile, US President Donald Trump ramped up tariffs against China on Monday, imposing 10 per cent on about $200 billion worth of Chinese imports, which will more than double next year.