It helped reinforce public censorship and maintained its own list of banned literature which influenced the State's list. Divorce allowing remarriage was banned in 1924 (though it had been rare), and selling artificial contraception was made illegal. The Church's influence slipped somewhat after 1970, impacted partly by the media and the growing feminist movement. For instance the Health (Family Planning) Act of 1979 showed the ability of the Catholic Church to force the government into a compromise situation over artificial contraception, though unable to get the result it wanted; contraception could now be bought, but only with a prescription from a doctor and supplied only by registered chemists. In the 1983 Amendment to the constitution introduced the constitutional prohibition of abortion, which the Church supported, though abortion for social reasons remains illegal under Irish statute law. However the Church failed to influence the June 1996 removal of the constitutional prohibition of divorce. While the church had opposed divorce allowing remarriage in civil law, its canon law allowed for a law of nullity and a limited divorce "a mensa et thoro", effectively a form of marital separation. In a further repudiation of the church's teaching, on 22 May 2015, 62% of Irish voters approved the legalization of same sex marriage in Ireland.