In an effort to address deadly human traffic jams on Mount Everest and weed out inexperienced climbers, Nepali officials on Wednesday formally proposed new safety rules that could significantly reduce the number of permits issued for the world's highest peak.

Under the measures, would-be climbers would have to prove that they have scaled another major peak, and tourism companies would be required to have at least three years' experience organising high-altitude expeditions before they can lead climbers on Everest, Nepal's tourism ministry said.

To discourage cost-cutting that can put climbers' lives at risk, the ministry also said that clients of

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