MANILA, May 23 (AFP) - The Philippines will reject calls by the Association of Southeast Asian Nations (ASEAN) to abolish tariffs on 60 percent of imports by next year, officials said Sunday. Assistant trade secretary Edsel Custodio said his government committee was concerned the Philippines would lose three billion pesos (79 million dollars) in annual revenues if the proposal is implemented. "We cannot allow that," he said. "We at the technical level are very hestitant to recommend" that tariffs be brought down to zero. "Of course, the main consideration is its impact on revenue." Manila last month said it was reviewing whether to scrap its minimum three-percent tariff policy as part of commitments to realise ASEAN's aim of borderless trade. The review came after ASEAN trade ministers agreed in an informal meeting in Phuket, Thailand early this year to give "best efforts" at implementing zero tariffs on 60 percent of products by next year. The Phuket timetable is in advance of the 2002 deadline for ASEAN members to lower tariffs on most products to between zero and five percent. ASEAN groups Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Vietnam.  