No there should not be any restrictions for the dresses worn by the girls.
It is purely lies in their choice. The ban for leggings may be an intention for u to ask this. In my concern, life is life, dress is dress. There should not be any restrictions for the type of dresses worn by girls. It is purely against their rights.
Everyone has many rights in the democracy. It is not fair to restrict one gender from wearing a type of dress.
So, I am against the statement given by you. All are human beings. They know what to wear, and what to not wear.
But, many says that the type of dresses worn by them, reduces the marks of boys. So, protests against this is in one side. We should not restrict them wearing a type of dress, for the shake of boys.
Hope this will help u.