facilitate joint redevelopment of the Tanjong Pagar Railway Station and the lands adjacent to the railway line. Under the ordinance, Malaysia was allowed to operate a customs, immigration and quarantine checkpoint at Tanjong Pagar railway station, together with the Singapore CIQ to facilitate convenient checkpoint procedures for passengers. Passengers to Malaysia would go through immigration checks prior to boarding the train, allowing trains to run uninterrupted from Singapore to destinations in Malaysia. Passengers arriving in Singapore would only go through immigration procedures for Malaysia and Singapore after arriving at Tanjong Pagar. Deadlock The 1990 POA states that the Tanjong Pagar railway station would be moved either to Bukit Timah first, or directly to Kranji. In exchange three parcels of railway land—at Tanjong Pagar, Kranji, and Woodlands—would be jointly developed on a 60–40 basis with the Malaysian government holding the larger share. However, three years later, Prime Minister Mahathir expressed his displeasure with the POA as it failed to include a piece of railway land in Bukit Timah for joint development. Malaysia's subsequent reluctance to go ahead with the 1990 agreement was based on the fear that it might eventually be forced to give up proprietary control over some or all of KTM's land in Singapore. Checkpoint relocation This issue has invariably become linked to Malaysia's CIQ checkpoint at Tanjong Pagar. In 1993, both countries had agreed to move their CIQ facilities in Tanjong Pagar to the Woodlands Train Checkpoint at the northernmost point of the island by 1 August 1998. The agreement was reached outside the context of the 1990 POA. KTM had also worked with Singapore on re-aligning its railway tracks at Woodlands when Singapore built a new immigration checkpoint there to replace the old checkpoint, and with new facilities to carry out train passengers' immigration clearance at the point of entry into Singapore rather than at Tanjong Pagar. However, in June 1997, while stating that the 1990 POA would come into effect only after it decided to relocate Tanjong Pagar station, Malaysia also informed Singapore that it had changed its mind on the relocation of the CIQ and decided not to co-locate its CIQ with Singapore's at Woodlands Train Checkpoint (WTCP) but to remain at Tanjong Pagar. In April 1998, Singapore informed Malaysia that it would be moving its CIQ operations to Woodlands while Malaysia would have to move its CIQ out of Singapore from 1 August 1998.