Description:How thin is too thin? That's what Israel lawmakers have called into question with new legislation that bans underweight models from the catwalk. Legislator Rachel Adato is helping set the precedent in the hope that it will save lives. The law stipulates that men and women cannot be contracted for modeling work without a doctor's stamp of approval - meaning that models body mass index ratio of weight to height must exceed 18.5 percent.(2:00)