The 1956 election brought 10 people from the Catholic Party as a Member of the Constituent Assembly, Say was appointed as Secretary of the Catholic Party Faction (1956–1959) accompanying IJ Kasimo as Chairman.
Pemilihan Umun tahun 1955 membawa 10 anggota Partai Katolik menjadi anggota Konstituante, Say ditunjuk sebagai Sekretaris Fraksi Partai Katolik (1956–1959) menemani IJ Kasimo sebagai Ketua.