- THE CHILEAN ELECTORAL SYSTEM BEFORE 1973 Chamber of Deputies (Lower House) Before 1973, Chile was divided in 29 electoral constituencies for the lower house elections. Each of the then existing 25 provinces represented one multi-seat constituency, with two exceptions: the province of Santiago was divided into four constituencies and uble was divided into two. Each constituency returned a ...www.psr.keele.ac.uk/docs/chile.htm