A unique feature of aircraft insurance policies is that they commonly specify
in the declarations the intended use of the aircraft (e.g., business and
pleasure, industrial aid, or crop dusting). This exclusion may invalidate
coverage if the aircraft is used for a purpose other than the one stated in the
policy. For the exclusion to apply, the aircraft typically must be used for an
unauthorized purpose with the knowledge and consent of the named insured, an
executive officer, or partner.