In order for WTO member countries to progress in Doha Round negotiations, and particularly on their negotiations on agricultural tariff reductions, they should clear the obstacle of how to convert specific tariffs into ad valorem equivalents (AVEs). This would be a transparency exercise that will allow tariffs to be categorized into different tiers set for different reductions. This working paper goes into the technical details of the issue, elaborating the various views about it, and introducing practical examples in this context. The paper also focuses on the Syrian perspective in this relevance, and how can Syria benefit from it.