With the coming into force of the post-war San Francisco Peace Treaty in late April 1952, the sovereignty of Formosa was still considered to be undetermined.
隨著戰後《舊金山和平條約》於1952年04月下旬生效，台灣的主權仍被認為是懸而未決的。
Letter: Secretary of State Acheson to the US Mission in the United Nations
Date: June 2, 1952
Subject: Policy of the United States with respect to atomic energy and the regulation of armaments
信函： 國務卿艾奇遜緻美國駐聯合國代表團
日期： 1952年06月02日
主題： 美國關於原子能和軍備管制的政策
(4) FYI US position is that sovereignty over Formosa not yet finally determined therefore seek to avoid issue of whether Formosa part of China for purposes of determining numerical ceilings.
(4) (僅供參考) 美國的立場是，台灣的主權尚未最終確定，因此為了確定數量上限，力求避免台灣是否屬於中國的問題。
[ source: Foreign relations of the United States, 1952-1954. National security affairs, Volume II, Part 2 (1952-1954), page 958 ]
See -- FRUS page for full content
[中文版本] https://www.twdefense.info/trust3/frusch-1952aq.htm