  We describe some of the extensions of the SM, including models with
spontaneous CP violation, where New Physics relevant for CP violation may
arise. It is emphasized that the SM predicts a series of exact relations among
various measurable quantities, such as moduli of CKM matrix elements and
rephasing invariant phases. These exact relations provide a stringent test of
the SM, with the potential to reveal New Physics.

High Energy Physics - Phenomenology