ABC plan (also known as the Nimetz initiative) was a proposed settlement of the Cyprus dispute, presented by the USA but co-authored by Britain and Canada as well, hence the abbreviation ABC (American-British-Canadian).
It projected a loose federation between the Greek and Turkish community of Cyprus and it was based on previous agreements between Greek and Turkish Cypriot leaders, and UN resolutions.
[1] The plan consisted of twelve points, according to Eleftherios Michael most important were:[2] The central federal government would be in charge of Foreign Affairs, Defence, finance and economy, ports, customs controls and immigration.
[1] Newly elected Greek Cypriot president Spyros Kyprianou was fast to reject the plan, Turkey followed.
Even so, the Nimetz initiative was utilized by other UN general secretaries as a base to new plans.