If blocked, no other effect can be used to reset the range, but other pre-range effects can be played.
100802
Gang Tactics
Only usable when the action is announced.
If the action is blocked, the resulting combat is at close range. Other effects cannot change this; skip the determine range step during that combat.
Rulings
If another effect also sets the range, the first to resolve has priority (eg. Asanbonsam Ghoul and Neutral Guard resolve after).
Must be played (as well as other "as the action is announced" action modifiers) before action modifiers that are not explicitly played "as the action is announced" (e.g., Conditioning).
Replace the action card (if any) before playing it.
Once the range is set, no other effect can be used to reset the range that round, but other pre-range effects can be played afterwards. Skip the Determine Range step for that round.
If another effect was already setting that round's range (e.g. Neutral Guard), that effect has priority.