The GST Council, in its meeting on Saturday, is likely to decide on reducing tax rates on life and health insurance premiums, while hiking it on high-end wrist watches, shoes and apparels, besides considering a separate 35 per cent tax slab for sin goods.The 55th meeting of the GST Council, chaired by Union Finance Minister Nirmala Sitharaman and comprising state counterparts, is likely to discuss rate rejig in about 148 items, besides, it will also deliberate on bringing Aviation Turbine Fuel (ATF), a major component for airline industry's operation cost, in the Goods and Services Tax (GST) fold.