The idea of a Tagging Call is a relatively recent development in challenge
square dancing. Originally, there were simply a number of calls that seemed to
be a variant on the theme of Tag The Line (where the caller could stop
the tagging action at any of the fractional Tag formations: 1/4, 1/2, and 3/4), and several of these calls included the word 'Tag' in
their name. Hence, we define a Tagging Call as a call wherein a part of the
call (usually the last part) feels like a Double Pass Thru.