I am trying to set a ‘select’ question (a dropdown list) field on my custom form to be a ‘mandatory’ field only when a certain condition is met. But there is no ‘Simple validation rules’ section in the Detail screen for ‘select’ question type? There is only ‘Complex validation rules’ which is not what I want to use. Other question types (e.g. option list) have ‘Simple validation rules’ section in their Detail screen. Can you please help.