Based on the constitutional norm, this number of signatures is sufficient to initiate a referendum.

He was an author of a June 30 joint statement by Haitian human rights advocates calling for a return to constitutional norms.

Military leaders, who ran the country until 1985, scrupulously respected constitutional norms.

But since his election as president in 1998, he has broadly respected constitutional norms - as Sunday's vote itself made clear.

Obviously it would be better for a nation struggling to establish constitutional norms to follow the law.

Buchanan also outlines importance of protection of the moral principles underlying constitutional norms.

"But I told him that I demand absolute respect for the legal and constitutional norms," he said.

Courts participate later in the process, determining whether, say, the legal result reached through this "bubbling up" is consistent with basic constitutional norms.

The decisions before Congress now call for a return to constitutional norms.

"We are proud that such a deep crisis has been resolved entirely within constitutional norms."