ks ▁are ▁over seen ▁by ▁the ▁Trade ▁Neg oti ations ▁Committee ▁( T NC ), ▁whose ▁chair ▁is ▁the ▁W TO ’ s ▁director - general , ▁currently ▁Roberto ▁A ze v ê do . ▁The ▁negoti ations ▁are ▁being ▁held ▁in ▁five ▁working ▁groups ▁and ▁in ▁other ▁existing ▁bodies ▁of ▁the ▁W TO . ▁Selected ▁topics ▁under ▁neg ot iation ▁are ▁discussed ▁below ▁in ▁five ▁groups : ▁market ▁access , ▁development ▁issues , ▁W TO ▁rules , ▁trade ▁facil itation ▁and ▁other ▁issues . ▁ ▁Before ▁D oh a ▁Before ▁the ▁D oh a ▁minister ial , ▁negoti ations ▁had ▁already ▁been ▁under ▁way ▁on ▁trade ▁in ▁agricult ure ▁and ▁trade ▁in ▁services . ▁These ▁on going ▁negoti ations ▁had ▁been ▁required ▁under ▁the ▁last ▁round ▁of ▁mult il ater al ▁trade ▁negoti ations ▁( the ▁Uruguay ▁Round , ▁ 1 9 8 6 – 1 9 9 4 ). ▁However , ▁some ▁countries , ▁including ▁the ▁United ▁States , ▁wanted ▁to ▁expand ▁the ▁agricult ure ▁and ▁services ▁tal ks ▁to ▁allow ▁trade - offs ▁and ▁thus ▁achieve ▁greater ▁trade ▁liberal ization . ▁ ▁The ▁first ▁W TO ▁minister ial ▁conference , ▁which ▁was ▁held ▁in ▁Singapore ▁in ▁ 1 9 9 6 , ▁established ▁permanent ▁working ▁groups ▁on ▁four ▁issues : ▁trans par ency ▁in ▁government ▁proc ure ment , ▁trade ▁facil itation ▁( custom s ▁issues ), ▁trade ▁and ▁invest ment , ▁and ▁trade ▁and ▁competition . ▁These ▁became ▁known ▁as ▁the ▁Singapore ▁issues . ▁These ▁issues ▁were ▁pushed ▁at