NMDC has signed a long-term agreement (LTA) for iron ore sales from its Donimalai mines recently. Vizag Steel (RINL) has accepted the NMDC LTA offers. The LTA signed with Karnataka-based players, will follow the 80:20 rule in which 20% of iron ore will be put into auctions with the objective of price discovery while the rest 80% will be offered under the LTA.