5.03 of V3 says that if a good order leader is present in a hex in which defenders are making Damage Checks, the leader's modifier is subtracted from Damage Check die roll. Does this apply if the leader is under a Move, Low Crawl, Fire or Ops Complete marker?
Rule 5 does not so limit it. Reading the rules strictly, it would seem that the leadership bonus benefits the defender whether or not the leader is under a status counter. Rule 11.11 of V3 Rules, which addresses the effect of a status counter on a leadership bonus, only says that the leadership bonus does not apply to a unit's Firepower in an attack roll if the leader is under a status counter. 11.11 does not say anything about a Damage Check.
The unofficial quick guide (available in the files section) is ambiguous. Under the Damage Check segment, the guide notes that a leader bonus applies to a Damage Check roll. But a parenthetical following notes that the leadership bonus is not applicable to an attack if the leader is under a status counter. That parenthetical seems irrelevant to a Damage Check since a DC is not an attack.
There are three things to remember when using leadership from a good order leader:
1. Leadership bonus applies for damage checks even if the leader has markers. 2. Leadership bonus applies for attacks only when the leader doesn't have operative markers (moved, fired, ops complete, etc.). 3. Leadership bonus for spotting only applies when the leader himself makes the spotting.