[en] The Hexapartite Safeguards Project (HSP) was created in November 1980 as an international forum consisting of technology holders of gas-centrifuge enrichment and the international safeguards inspectorates in order to develop a strategy for applying effective and efficient safeguards to a commercial centrifuge enrichment plant without compromising the sensitive information related to centrifuge enrichment technology. The participants were Australia, Japan, the so-called 'Troika' states, i.e. the Federal Republic of Germany (now Germany), the Netherlands and the United Kingdom, the United States, EURATOM and the IAEA. They met for some two years, producing in February 1983 a final report with an agreed strategy of the 'LFUA' (Limited Frequency Unannounced Access) Model. Its basic feature is to allow safeguards inspectors routine access to cascade halls with short notice and an agreed average frequency. This model has served as the basis for enrichment plant safeguards in HSP countries with necessary modifications and adaptations reflecting the specific features of individual plants. However, more than two decades have passed since the conclusion of the HSP and it has become necessary to develop new safeguards approaches reflecting the recent developments in enrichment and safeguards technology, particularly the advent of large-scale facilities. SAGSI (Standing Advisory Group on Safeguards Implementation) recently reviewed and approved the Agency's proposed approach. The author, served as the Secretariat of the HSP in charge of drafting its final report. This paper provides an outline of the outcome of the HSP: (i) in a historical perspective with an emphasis on the issues that helped define the HSP deliberations; (ii) how they were addressed in the LFUA model; (iii) the significance of the HSP in the context of international safeguards; and (iv) its limitations due to prevailing legal interpretations at that time. (author)