See here (https://mortem-et-gloriam.co.uk/smf/index.php?topic=3779.0).
Change "PBW upgrade colour when shooting Cv, Cm. Ch <= 1BW".
This replaces the current upgrade which applies at any range.
As an example, combining 5.1 & 5.2: An experienced longbow UG charged by protected cavalry will shoot with GREEN dice with S counting as wounds.