Welle
The CL600 series are NOT more restrictive than those other types. NO airplane is certified to take-off with contaminated wings, no regulatory authority allows, approves or has approved operations with anything else than properly de-iced wings using correct fluids and procedures. CL-series icing-related accidents have all been the result of improper de-icing and failure to follow the approved procedures. The -8 cannot take off with contaminated wings.
GF