The act does not recognize the terminology of "Republic of China"
it defines the term TAIWAN to include, as the context may require, the main island of Taiwan,the Pescadores…澎湖
…other islands or archipelagos under the control of the Republic of China, Kinmen、 Matsus, etc. are left outside the definition of Taiwan…金門、馬祖不屬於台灣關係法
Taiwan Relations Act - Wikipedia