This is a law which directly follows the Law of Resemblance.

In the Law of Resemblance, in a group of cards which resemble each other, there is an exception. For example, if you look at the Camoin 3x7 diagram, in the bottom row the figures are all clothed, except for the angel in the card the Lover. They are all large, except for in the card the Lover. Etc.

This Law of the Exception is also very interesting when used in my method of Tarot reading.