Occasionally over the course of the history of basketball, there was a strange blip that seemed to defy convention.
One of those happened in the mid-1980s when national rules mandated that high school basketball coaches could not stand during the course of games.
It was reversed in November 1988, but only somewhat, according to the Associated Press and reprinted in the November 15, 1988 Waycross Journal-Herald:
“The high school coaches cannot stand and question calls by officials, as in college basketball. They can only stand to talk to their players or to react to an outstanding play.”
Not that arguing on your feet is a necessity.
The coaches box created from the rule change was six feet in length.
Georgia High School Basketball Project blog 