These were then gradually put into practice: The measures of Hartz I – III were undertaken between January 1, 2003, and 2004, while Hartz IV was implemented on January 1, 2005.
Disse blev derefter gradvist sat i praksis: Foranstaltningerne i Hartz I til III blev gennemført imellem 1 januar 2003, og 2004, mens Hartz IV blev implementeret den 1. januar 2005.