Originally, ICA was considered an Anglo-Chinese school with a double curriculum (Chinese and English). In 1954, ICA became a Filipino school offering the Chinese Language Arts program as an essential part of the curriculum. While majority of the student population is Chinese Filipino, Chinese heritage is not a main criterion for admission to ICA; a majority of ICA's students have fathers, siblings and other male relatives who are studying or have matriculated in Xavier School. ICA undertook the accreditation process of Philippine Accrediting Association of Schools, Colleges and Universities or PAASCU in SY 1983-84 and received full-accredited status in 1986. It was reaccredited in 1989, 1994, 1999 and 2004. In late 2009, the High School Department was granted a top-tier Level III Accreditation by the Federation Accrediting Agencies of the Philippines (FAAP).