State to ask Hanoi to review sugar tax 11 published : 17 Jun 2021 at 06:26 Refined sugar on display at a supermarket in Bangkok. Thailand looks set to ask Vietnam to review its punitive measures on Thai sugar and open a new investigation next year after Vietnam ruled to impose an anti-dumping (AD) levy of 47.64% on some sugar products from Thailand. Keerati Rushchano, director-general of the Foreign Trade Department, said that after one year of Vietnam imposing the AD measure, Thailand will ask Vietnam to review it and open a new investigation as required by World Trade Organization (WTO) rules. "We think there is still some uncertainty such as damage caused by Thai sugar products in Vietnam," said Mr Keerati. "Thailand's authorities need to give a clear and accurate explanation."