Switzerland’s plans to block the domains of internationally licensed online gambling operators appear headed for a voter referendum.

Last September, Swiss legislators approved controversial changes to its gambling laws that will restrict online gambling operations to those controlled by local land-based casino operators. To ensure the success of these sites, Swiss internet service providers (ISPs) will be compelled to block the domains of unauthorized gambling sites.

This domain-blocking plan, set to take effect in 2019, met with pushback from Swiss ISPs and civil libertarians, who decided Swiss voters should have a say in this flirtation with authoritarian censorship. Swiss law allows voters a referendum on contentious legislation provided 50k citizens sign the necessary petition within 100 days of the law’s passage.

On Tuesday, Swiss media outlet Blick reported that a coalition of three political parties and the Internet Society Switzerland Chapter (ISOC-CH) had so far collected around 65k signatures, of which 25k have been certified by the state. The group has until January 18 to certify the additional 25k signatures needed for the referendum to be approved.