Please see https://mortem-et-gloriam.co.uk/smf/index.php?topic=2068.0 (https://mortem-et-gloriam.co.uk/smf/index.php?topic=2068.0) on distances.
In the UK at least - this rule has been played incorrectly.
Richard
I have always played it as <= and have never had it queried, even when playing you!
Glad to hear it. Maybe it is just me getting old and confused!