ˌɔn twˈɛnti nˈaɪn ˈeɪpɹəl nˈaɪntiːnhˈʌndɹɪd nˈaɪnti nˈaɪn, ðə tɹˈaɪpɑːɹtˌaɪt kəmˈɪʃən kəmplˈiːɾᵻd ɪts ɐnˈæləsˌɪs ɔnðə pɹˈɑːspɛkts ʌv ɹˈiːdʒənəl koʊˈɑːpɚɹˈeɪʃən, ænd ðə θɹˈiː kˈʌntɹiz sˈaɪnd ɐn ɐɡɹˈiːmənt tʊ ʌpɡɹˈeɪd ðɪ ɐɡɹˈiːmənt tʊ ɐ tɹˈiːɾi fɔːɹ tˈuː θˈaʊzənd.
On 29 April 1999, the Tripartite Commission completed its analysis on the prospects of regional cooperation, and the three countries signed an agreement to upgrade the Agreement to a treaty for 2000.