Iran approved a law requiring picture-based warnings to be displayed on all cigarette packages on May 29, 2008. The picture-based warnings were implemented in Iran starting January 20, 2009. The warnings are required to cover 50% of the front and back of all cigarette packages meaning, overall, 50% of the package space is appropriated to health warnings. Eight health warnings were to be rotated on cigarette packages and a different set of warnings was to be rotated every two years. New pictorial warnings began appearing on packages in late 2011-early 2012.