Ephrat Livni writes:
‘Rosie Henderson raised the clameur on Aug. 14 by kneeling, calling for help, and reciting the Lord’s Prayer in Norman French, the Guardian reports. She protests a project to narrow a road in St. Peter Port, arguing that it will endanger both pedestrians and motorists in the self-governing UK possession.
The law Henderson invoked is enforceable and creates an immediate injunction. She had 24 hours after issuing the plea to register her claim in court. Work on the road project stopped as soon as the miffed citizen invoked the ancient rule and construction will remain halted until a court decides the case.
The clameur was first recorded in Norman law in the 13th century. Its use is believed to have originated in the 10th century as an appeal to Rollo, Viking founder of the Norman dynasty, according a 2008 article in the Jersey and Guernsey Law Review (pdf) by lawyer and legal historian Andrew Bridgeford.
… The clameur is serious business. “[I]t enables the private individual to co-opt the power of the courts in proclaiming an injunction,” Bridgeford says. “Such a powerful tool is not to be invoked incautiously. A claimant who is found to have raised the Clameur de Haro incorrectly risks not merely a penalty in costs but also punishment for contempt of court.” …’