Don't worry folks
You've got yourselves all worked up for nothing. "BMI" is simply a new medical term that replaces an old one. It means Basic Mental Index and replaces the term "IQ" which is no longer politically correct. It uses the same scale and values as the former "IQ" index, and is only being used to screen senior managers in the aviation industry in the UAE, hence the requirement for a test result of less then 30. It's as "simple" as that.
Grizz