  The success of the mean field composite Fermion (MFCF) picture in predicting
the lowest energy band of angular momentum multiplets in fractional quantum
Hall systems cannot be found in a cancellation between the Coulomb and
Chern--Simons interactions beyond the mean field, due to their totally
different energy scales. We show that the MFCF approximation can be regarded as
a kind of semi-empirical Hund's rule for monopole harmonics. The plausibility
of the rule is easily established, but rigorous proof relies on comparison with
detailed numerical calculations.
