Exasperated by a series of accidents on western Europe's highest peak involving ill-equipped tourists, mayor Jean-Marc Peillex has issued a local regulation mandating mountaineering equipment.
The most popular route to scale the 4,810-metre (15,780-feet) mountain, known as the “voie royale”, runs through Peillex's Saint-Gervais district.
The threat of a fine — set to be modest 38 euros (44 dollars) — was needed because thrill-seeking visitors “have refused to listen to the warnings,” Peillex told AFP on Thursday.
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The new rule, which will be translated into English and Russian and displayed publicly, requires climbers to have a hat, a waterproof mountain jacket, boots, crampons and equipment needed to escape from crevices.
Peillex is hoping police will enforce the law to send a message to others.
Mountain rescue teams were searching for a 46-year-old man who went missing after attempting to climb the mountain on Tuesday, apparently with no equipment.
Local authorities also stopped a couple from Hungary trying to take their nine-year-old twins towards the summit.