A new South Korean bill banning leaflets and propaganda from being sent over the border struck a nerve in the National Assembly on Wednesday as it passed the first step of becoming official law.

The bill, nicknamed the “anti-leaflet law,” will slap those sending fliers to North Korea or broadcasting loudspeaker messages over the border with up to three years in prison or a fine of up to 30 million won (about $27,200). Several defector-led activist organizations and human rights groups are known for engaging in these activities to get outside information into the DPRK.