  In a wide class of extensions of the Standard Model there is a scalar
resonance with the quantum numbers of the usual Higgs boson but with different
couplings to fermions and gauge bosons. Using an effective Lagrangian
description, we examine the phenomenology of such a generic nonstandard Higgs
boson at the LHC. In particular, we determine the circumstances under which
such a particle can be observed in its $ZZ$ decay mode and distinguished from
the Higgs boson of the Standard Model. We briefly comment on the energy scale
effectively probed at the LHC, if the nonstandard nature of an observed Higgs
particle can be asserted.
