Switzerland’s plans to block the domains of internationally licensed gambling sites will face a voter referendum after opponents successfully gathered enough signatures.

On Thursday, a coalition of Swiss political party youth groups, internet service providers and civil liberty advocates submitted a 60k-signature petition protesting the government’s plan to block international gambling operators from accepting action from Swiss punters.

The government approved new gambling laws last year that will allow Swiss land-based casino operators to offer online gambling services, while ensuring there’s no competition from unauthorized international sites. The land-based operators have long blamed international sites for their falling revenue, despite recent evidence to the contrary.

But Swiss law states that any new law can be challenged by voters if at least 50k voters sign a petition within 100 days of a new law’s passage. The anti-blocking campaign easily exceeded that total by the January 18 deadline. The government must now validate the signatures before setting a referendum date.