N}=1$ supersymmetry is present or not. The reason is that the global “hopping” symmetry of the 4D theory, which is closely related to the enhanced SUSY at low energies, becomes a spacetime symmetry of the 5D theory. The Lorentz symmetry generators are part of the full SUSY algebra. Hence, 5D supersymmetry requires an enhanced Lorentz symmetry. This manifests itself in a doubling in the number of supersymmetry generators, which then form an irreducible representation of the 5D Lorentz group. If supersymmetry is indeed enhanced, then the theory must automatically be 5D Lorentz invariant for consistency (meaning that the speed of light should not differ in the fifth direction). The converse is also true: if one can show that 5D Lorentz invariance is maintained, then the existence of the four supercharges implies that there must be another set of four supercharges present in the theory. We will pursue this latter route. We will calculate the kinetic term along the fifth dimension for the fermionic fields, and show that 5D Lorentz invariance is automatically obtained; that is, the speed of light along the fifth direction automatically matches the speed along the non-latticized four dimensions, just as has been suggested in [@ACG]. Then 