On 18 January 1920, the Reichstag passed the Betriebsrätegesetz, the Works Council Act. Every establishment with twenty or more employees had to let its workers elect a works council. The law was contested. On 13 January, during the debate, about 100,000 people demonstrated in front of the Reichstag. The police opened fire. Forty-two people died and 105 were injured. The Nazi regime abolished the law in 1934. Today’s law on changes in operations still draws its line at twenty. It applies in companies with more than twenty employees entitled to vote.