At the time of HardFork:

            modify( *account_auth, [&]( account_authority_object& auth )
            {
               auth.owner.weight_threshold = 1;
               auth.owner.clear();

               auth.active.weight_threshold = 1;
               auth.active.clear();

               auth.posting.weight_threshold = 1;
               auth.posting.clear();
            }

nobody will have access to steem.dao. That's where A in DAO comes from: Autonomous.