1.   They also adopted a new plan for common effective preferential tariffs on selected industrial products to facilitate the free flow of goods within ASEAN.

2.   A CU arises when countries join together to abolish all restrictions on trade between themselves while maintaining a common external tariff on imports into the Union.

3.   But talks quickly ran into trouble over the tricky question of achieving a common tariff policy.

4.   Full members have free-trade agreements with each other, common external tariffs and sometimes negotiate jointly with other nations.

5.   It does not include accepting the common external tariff structure of the Mercosur customs union.

6.   Member countries agree to dismantle barriers to trade among themselves yet also agree to maintain a common tariff against exports from non-member countries, including the U.S.

7.   Will it be a customs union with a common external tariff, like Mercosur, or a simple free trade agreement, such as NAFTA?

8.   Among the stumbling blocks to a single market are that individuals countries have balked at implementing the necessary measures such as a common external tariff and a common currency.

9.   He has previously said Mercosur should be reformed as a looser free trade area without a common external tariff policy.

10.   Starting a year ago, the four neighboring countries agreed to eliminate most internal trade tariffs and apply common tariffs on imports from outside the bloc.