After sparking Spain's deepest political crisis in 40 years by voting this week to move ahead with a referendum, Catalonia's separatist-controlled regional parliament upped the ante by passing a bill in the early hours which would take effect if they won the popular vote on October 1.
The separatists say the law would serve as a temporary "basic law" in the wealthy northeastern region of 7.5 million people in the event of a "yes" vote, until a new constitution was in place.
The court was set today to suspend the law outlining a possible transition, too.
But the separatists have ignored the actions of the judges -- most of them named by the ruling conservatives -- branding them illegitimate.
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"It is worrying that the state is seeking to scare people and make threats, faced with a desire for a vote," Lluis Corominas, vice president of the Catalan parliament, told national radio today.
The warning went out to all members of the regional government, as well as mayors, the directors of regional public broadcasters, and Catalan police chief Josep Lluis Trapero, a popular figure after winning plaudits for his handling of last month's terror attacks in Barcelona and Cambrils.
The region's 948 mayors now find themselves in a delicate position.
Neus Lloveras, mayor of the town of Vilanova outside Barcelona who heads an association of pro-independence municipalities, said "more than 600 town halls have already informed the regional government of the total availability" of their polling stations.
Others have said they will refuse to organise a banned referendum, such as Angel Ros, mayor of the town of Lerida.
"We would be leaving the legal framework," he told TV3 television.
Yesterday, the national prosecutor announced that investigations into the planning of the referendum would be carried out with the help of the Civil Guard and Catalan police, and that voting material would be seized.
Corominas retorted that "there will not be enough paper to send all these summons and scare practically half of Catalan society".
With its own language and customs, Catalonia accounts for about one-fifth of Spain's economic output, and already has significant powers over matters such as education and healthcare.
The region remains divided, however. In a survey by the Catalan Centre of Opinion Studies in June, 41.1 per cent backed independence while 49.9 rejected it.
Some 70 per cent wanted a referendum, however, to settle the question once and for all.