Weight restrictions are ineffective. For example, BMI only takes into account weight and height but not bone density and fat percentage. Many models are teenagers who eat normally but are naturally skinny. Why should they be stopped from working? In some instances it has been more effective to ask the model to provide a certificate from a doctor proving they are healthy. Given that very young models (often 14 or 15 years old) are also exploited financially and sexually, perhaps it would be best to have minimum wages for modeling instead.