  A fractional quantized Hall state with filling fraction $\nu = p/(2mp+1)$ can
be modeled as an integer quantized Hall state of transformed fermions,
interacting with a Chern-Simons field. The electromagnetic response function
for these states at arbitrary frequency and wavevector can be calculated using
a semiclassical approximation or the Random Phase Approximation (RPA). However,
such calculations do not properly take into account the large effective mass
renormalization which is present in the Chern-Simons theory. We show how the
mass renormalization can be incorporated in a calculation of the response
function within a Landau Fermi liquid theory approach such that Kohn's theorem
and the $f$-sum rules are properly satisfied. We present results of such
calculations.
