Change-Over Notes, how to classify or designate all of the different types?
When I consider the topic on a basic level there are the most obvious:
Series Year and subsets, A, B, C and so on to l ?.
(I question if signature changes can always be distinguished and easily understood by the general public)?
Should a "Change-Over be considered complete with out having both sides of a yearly change?
First and last of circumstances like Hawaii and Africa, or just the notes before or after the events?