  The 2D pair-condensate is characterized by a charge ordered state with a
"checkerboard" pattern in the planes and with an alternating superstructure
along the c-axis.We find that Coulomb energy gain occurs along the c-axis,
which is proportional to the measured condensation energy and is due to
inter-layer charge complementarity (charge asymmetry of the boson condensate.
The static c-axis dielectric constant and the in-plane coherence length are
also calculated for various cuprates and compared with the available
experimental data. We find excellent agreement .
