TAIWAN's opposition Democratic Progressive Party (DPP) has threatened to block the approval for a copyright pact between Taiwan and the United States in order to press the ruling Kuomintang to allow the DPP a direct say in the so-called ''Koo-Wang talks''in Singapore next week. The DPP made a last-minute bid to take part in the meeting as officials from Taiwan's Strait Exchange Foundation (SEF) and the mainland's Association for Relations Across the Taiwan Strait (ARATS) were preparing for the two days of ''unofficial talks'' between their senior leaders. Sources in Taiwan said that, under pressure from Beijing, the KMT was expected to reject demands from the DPP to let a observer attend the talks. The DPP is said to be angry at the weak stance taken by the KMT and have threatened to boycott deliberations on a copyright pact at the Legislative Yuan. The pact with the US was passed by the legislature's domestic and foreign affairs committees yesterday, pending approval from the legislature tomorrow. The pact is instrumental in averting possible trade sanctions from the US which is to decide at the end of this month whether to place Taiwan on a list of unfair traders. Taiwan Foreign Minister, Mr Fredrick Chien, Economics Minister, Mr Chiang Pin-kung and top economic planner, Mr Vincent Siew, have said they would resign if US sanctions are imposed despite passage of the pact and revisions to the copyright law before the end of the month. Meanwhile, in Singapore, preparations have begun for the talks. The first group of officials from China's ARATS arrived in Singapore yesterday, two days after an advance team from the SEF flew in from Taipei, to begin arrangements for the historic summit. ARATS chairman, Mr Wang Daohan, and SEF chairman, Mr Koo Chen-fu, are scheduled to meet on Wednesday and Thursday following talks in Beijing this month between Mr Tang Shubei, vice-chairman of the association, and Mr Cheyne Chiu, SEF secretary-general. Although Mr Wang and Mr Koo are meeting as private intermediaries, they both have official ties through their respective roles in the Communist Party of China and the KMT. Mr Zhou Xinpei, First Secretary at the Chinese Embassy in Singapore, said the first ARATS team would be followed by two more groups of delegates, headed by Mr Tang and Mr Wang. Mr Tang, who arrives today, will finalise arrangements for the summit with Mr Chiu, following preliminary discussions between SEF deputy secretary-general, Mr Lee Ching-ping, and his ARATS counterpart, Mr Qiao Feng. An SEF statement said one reason why Singapore was chosen for the talks was to achieve a ''fair and balanced reporting of the event by the media''. It said both sides had agreed that the talks were to deal with civilian, administrative, economic and functional issues. The agenda will include setting up regular and systematic communications channels, combatting illegal activities, sponsoring future economic conferences and encouraging cultural exchanges. Agreements on ''The Authentication of Documents'' and ''Verification and Compensation of Lost Registered Mail'' may also be formally signed during the talks.