I'd say Hempels 210 has that requirement because their 210 has had more belly rubs than a labrador, though funny enough I believe all the incidents were not done by low hour pilots, perhaps they were low on time on the a/c though. Overall their requirements for the a/c aren't that high, there used to be another one on the field that had a 300 hour requirement, but it was badly damaged and the owner withdrew the use of the a/c to the school. Alas only one left on the field.