After being informed of his appointment to the Pontifical (Preparatory) Commission on Lay Apostolate, Cardijn announced it in a press release drafted in all likelihood by Marguerite Fiévez.
SOURCE
Original French
Joseph Cardijn, Communiqué de presse 28 09 1960 (Joseph Cardijn Digital Library)
English translation
Joseph Cardijn, Press release 28 09 1960 (Joseph Cardijn Digital Library)