Middle/Southern Region is made up of states located in the southern parts of the United States, Puerto Rico, the Virgin Islands and the West Indies.

The North Central Region is made up of states primarily located the midwestern parts of the United States and Canada.

The Northeastern Region is made up of U.S. states and Canadian provinces in the northeast part of North America.

The Western Region is made up of states located on the western most parts of the United States, Canada and states of Mexico geographically corresponding to this region.