In 1884 there was a minor revision. In 1887 the census suffrage system was replaced by one based on minimal wealth and education, which allowed an ever-growing percentage of the male population to be given the right to vote; therefore this provision was at the time nicknamed the "caoutchouc-article". The election interval for the House of Representatives was changed from two (with half of it replaced) to four years (with full a replacement of now hundred members). Eligibility for the Senate was broadened. Any penal measure not based on formal law was prohibited.