In defiance of restrictions imposed by Madrid's Electoral Board in the run-up to the November 20 general election, organizers of the 15-M citizen protest movement have invited supporters to once more unite in the capital's Puerta del Sol square on Friday.

The Indignants are also encouraging people to participate in a "state-wide demonstration" on Sunday November 13, one week before Spain goes to the polls.

"In the face of the Electoral Board's ban, we will return to the square," the movement's Madrid wing declared in a statement published on its website. "A group of individuals has worked on the idea of inviting citizens to come together in Sol on Friday to experience the opening of the electoral campaign together."

Participants will be able to hold meetings and non-partisan election debates, as well as offer explanations of the voting options at the rally, which will be followed by a mass sticking up of non-partisan posters.

The Madrid Electoral Board declared the 15-M demonstrations in Sol square illegal in the run-up to local elections in May, ruling that "no extraordinary or serious causes" existed to justify the protest and that it influenced citizens' right to decide their vote freely. However, protestors defied the ban to maintain a presence in the square beyond the election date.