We have shown that light will travel paths of extreme time where the time is dependent upon both the media being traveled within, as well as the path taken. As such, we have the general form for the Principle of Extremes, whereby all true paths will be such that $n_i \cdot \theta_i = n_r \cdot \theta_r\text{.}$ This unifies our rules for planar, spherical, and elliptical mirrors as well as refraction of light.