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  STEPPING INTO A NEW EDITION OF WARHAMMER 40,000
   STEPPING INTO A NEW EDITION 
  OF WARHAMMER 40,000
  Since the release of Warhammer 40,000 we have 
  received lots of questions regarding some of the rules. 
  Many of these are from veteran players, those who have 
  played previous versions of Warhammer 40,000 and so 
  are used to playing using certain mechanics that have 
  either now subtly changed or do not exist within the 
  new rules at all. This has created some situations that 
  are unique to these veteran players as they continue to 
  apply preconceptions from previous editions, and so 
  this document has been created with the purpose of 
  guiding existing players to the rules as presented in the 
  latest edition of Warhammer 40,000. This guide has 
  been created alongside our expert group of playtesters – 
  players who themselves fall into the category of veterans 
  and who have a huge amount of experience of just this 
  kind of transition. If you are new to Warhammer 40,000 
  you do not need to read this guide, as you will have no 
  preconceptions to unlearn.
  Core Rules Questions
  Q. If a Vehicle model has a base, but it is itself larger 
  than the base (such as a Stormraven Gunship), what do 
  I measure to – the base or the hull of the vehicle?
  A. Unless such a model’s datasheet has an ability saying 
  otherwise, you measure to and from the model’s base. 
  Q. How do I determine if a model is visible to 
  another model?
  A. The models are visible to each other if you can draw 
  a straight, uninterrupted line between any part of one 
  model to any part of the other.
  Q. How do vertical distances work for movement 
  and measurements? 
  A. All distances are measured in three dimensions, so if 
  a unit moves over a hill or scales a wall, the horizontal 
  distance and vertical distance combined cannot exceed 
  its Movement characteristic. This means that in order 
  to traverse across an obstacle, you must move up to the 
  top of that obstacle, move across the top of it, then move 
  down it.
  Q. What happens when an Infantry model cannot 
  completely end its move on a floor of ruins when 
  attempting to scale the walls? 
  A. If an Infantry model is unable to complete a move 
  to a stable position, use the Wobbly Model Syndrome 
  guidelines in the core rules to identify with your 
  opponent where your model’s actual location is.
  Q. Can I roll to Deny the Witch with a psyker that is not 
  targeted directly by a psychic power? 
  A. Yes. 
  Q. Does my psyker need to be visible to the enemy 
  psyker manifesting the psychic power to attempt to 
  Deny the Witch? 
  A. No. The psyker just needs to be within 24" of them.
  Q. If a psychic power affects a friendly unit, does that 
  unit need to be visible to my psyker for me to be able to 
  manifest it upon them? 
  A. No, unless the specific psychic power says otherwise. 
  Q. Can you manifest psychic powers while embarked 
  upon a transport, whether they have the Open-topped 
  ability or otherwise? 
  A. No, unless specifically stated otherwise.
  Q. When shooting with models, do I measure ranges 
  from the model’s weapons, or from its base (or hull, if 
  it’s a vehicle without a base)?
  A. Distances are measured from the closest point of the 
  model’s base (or from the closest point of the vehicle’s 
  hull if it does not have a base) to the closest point of the 
  target’s base (or hull). 
  Q. Can you wound models in a target unit that 
  are not visible to the firer or that are beyond its 
  maximum range?
  A. Yes. 
  When resolving a shooting attack, only one model in the target 
  unit needs to be visible and within range of the firing model 
  in order to make the attack. Your opponent can allocate any 
  resulting wounds to any unwounded models in the target unit 
  that they choose, even those that are not visible or within range 
  of the attack.
  Q. Is there any limit on the number of enemy units I 
  can choose as targets of a charge?
  No – so long as all the targets of the charge are within 
  12", you can declare as many targets of a charge as 
  you like.
  
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  STEPPING INTO A NEW EDITION OF WARHAMMER 40,000
  Q. Can a single-model unit declare charges against 
  multiple units? 
  A. Yes. 
  A single model can declare charges against several units, even 
  if it would be impossible to finish the charge within 1" of all 
  of them. Doing so gives you more choices on where to actually 
  move, depending upon your subsequent charge roll, but leaves 
  you vulnerable to more Overwatch.
  Q. Does a weapon have to be in range of the charging 
  unit to fire Overwatch at it? 
  A. Yes.
  Q. A unit has a special rule that says, for example, 
  ‘add 3" to the dice roll(s) for determining the charge 
  distance of the unit’. Does that mean my unit can move 
  15" if I roll a double 6 on 2D6? 
  A. Yes. Note though that you can only ever declare 
  a charge against an enemy unit you are within 
  12" of, unless the charging unit has an ability that 
  says otherwise.
  Q. Must a unit end its charge move as close as possible 
  to the target(s) of its charge (i.e. base-to-base contact), 
  and must a unit attempt to engage as many of the 
  targets of its charge as possible?
  A. No. The first model in the charging unit that is 
  moved only has to finish its charge move within 1" of 
  at least one of the units that was selected as a target of 
  its charge. 
  The only other restrictions that apply are that the charging unit 
  must end its move in unit coherency, and no models in the 
  charging unit can move within 1" of an enemy unit that was 
  not selected as a target of the charge.
  Q. Do units have to pile in and consolidate?
  A. No, these extra moves are optional.
  Also note that if a unit does pile in or consolidate, you do 
  not need to necessarily move all of the models in the unit (but 
  any that do move must end their move closer to the nearest 
  enemy model). 
  Q. When can I target an enemy Character that has a 
  Wounds characteristic of less than 10?
  A. Such a Character can only be targeted in the 
  Shooting phase if it is the nearest visible model to 
  the firing model. You can target enemy Characters 
  without restriction in the Psychic phase*, Charge 
  phase, Fight phase, etc. You may also make shooting 
  attacks at enemy Characters which occur outside the 
  Shooting phase (i.e. when resolving Overwatch in the 
  Charge phase).
  *Note, however, that some psychic powers, such as Smite, do 
  not target units but instead affect the nearest enemy unit.
  Q. Can I embark within a transport at any time 
  other than in the Movement phase, such as following 
  a consolidate move that takes a unit within 3" of 
  a transport? 
  A. No. You may only embark within or disembark a 
  transport in the Movement phase, unless a rule or ability 
  explicitly says otherwise.
  Q. Can a unit that Advances or Falls Back embark 
  within a transport? What about if the transport has 
  moved before – can a unit still embark inside?
  A. Yes, yes and yes (remember though that a transport 
  cannot both embark and disembark units in the 
  same turn).
  Q. How do objective markers work for purposes of 
  vertical distances? 
  A. Include both vertical and horizontal distances when 
  determining the number of models within range of an 
  objective marker.
  Index Books Questions
  Q. How do the weapon profiles of Cavalry mounts, 
  and other models such as chariots (which have weapon 
  profiles for riders and mounts), work?
  A. Each weapon profile is treated as a separate weapon 
  the model is equipped with. 
  Note that typically these weapon profiles have abilities that 
  mean they can be used to make additional attacks. 
  For example, a Thunderwolf mount provides its rider with a 
  set of extra attacks with its own melee weapon profile (crushing 
  teeth and claws). So, the rider can make all its attacks using, 
  for example, its thunder hammer, and then it can make 
  an additional set of attacks using the Thunderwolf’s melee 
  weapon profile. When resolving these attacks, bonuses and 
  penalties to the rider’s hit rolls and wound rolls also apply to 
  the Thunderwolf’s attacks – it is effectively a weapon wielded 
  by the rider. As such, where a mount’s weapon profile has a 
  Strength characteristic other than User – as is the case with 
  the Thunderwolf – the Strength of the mount’s attacks is not 
  affected by changes to the model’s Strength. Note, however, that 
  the mount’s weapon profile would be affected by changes to the 
  Strength (or other characteristics) of a model’s weapons.
  Q. The Mob Rule ability says that ‘a unit with this 
  ability can use the number of models in their unit as 
  their Leadership characteristic’. Is this fixed at the 
  number of models in the unit at the start of the battle, 
  or does it vary throughout the battle? 
  A. It is not fixed and will vary throughout the game. 
  This ability is based upon the number of models in the unit at 
  the time. Thus, as the unit suffers casualties throughout the 
  battle, its Leadership characteristic will be lower.
  
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  STEPPING INTO A NEW EDITION OF WARHAMMER 40,000
  Q. If the Strength from Death ability is triggered, and 
  I choose to manifest a psychic power as if it were the 
  Psychic phase, can I attempt to manifest a power I 
  already attempted to manifest this turn? 
  No. The psyker can only attempt to manifest a different 
  psychic power that it knows. 
  Q. If the Strength from Death ability is triggered, and 
  I choose to manifest a psychic power as if it were the 
  Psychic phase, can I attempt to manifest a power that 
  another psyker in my army has attempted to manifest 
  this turn? 
  A. Yes. Note, however, that if you are playing a matched 
  play game, then the Psychic Focus rule still applies, 
  in which case your psyker cannot attempt to manifest 
  a psychic power that has already been attempted 
  by another psyker in your army this turn (with the 
  exception of Smite).
  Q. Can I use a Soulburst action to charge in the Fight 
  phase and fight in the same phase? 
  No. A unit that uses a Soulburst action to charge in the 
  Fight phase cannot then fight in that phase.
  Q. If I use a Soulburst action to charge in my opponent’s 
  turn (other than in the Fight phase), when does that 
  unit fight in the Fight phase? 
  This unit will fight before any units that did not charge 
  this turn. If your opponent also has units that have 
  charged this turn then players alternate choosing units 
  that have charged to fight with, starting with the player 
  whose turn it is (in this case, your opponent’s).
  Q. How do psychic powers and abilities that can slay 
  models – like ’Eadbanger and the C’tan power Time’s 
  Arrow – interact with abilities such as Commissar 
  Yarrick’s Iron Will, which allows him to negate his final 
  wound on 3+? 
  A. These powers and abilities do not inflict damage or 
  cause models to lose wounds, so in these cases abilities 
  like Yarrick’s Iron Will have no effect.
  Q. Do models that are still embarked within a transport 
  count as being in range of an objective marker if their 
  transport is within range of it?
  A. No.
  Q. If a unit has an aura ability, and it is embarked within 
  a transport, does that aura ability still apply, whether 
  the transport has the Open-topped ability or otherwise?
  A. No.
  Q. If I charge a transport that has the Open-topped 
  ability, can units that are embarked inside also fire 
  Overwatch at the charging unit?
  A. No.
  Q. Can a model with the ability to repair vehicles – such 
  as a Techmarine or an Ork Mek – use that ability to 
  repair a transport they are currently embarked within? 
  No.
  Q. Do Space Marine teleport homers count as separate 
  units for the purposes of deployment? 
  No. It is set up at the same time as the unit that is 
  equipped with a teleport homer is.  
  Q. Do models with profiles, such as Armorium Cherubs 
  and Ammo Runts, count as a model for the purposes of 
  embarking within transports or when measuring ranges 
  to and from the unit? 
  A. Yes – for all rules purposes they are part of the unit.
  
SOURCE: textdata/thevault/Warhammer/40k/1st-8th Editions (Prior)/8th Edition (2017)/5) FAQs/2017 FAQs/Warhammer_40000_Stepping_into_a_New_Edition_of_Warhammer_40000_ENG.pdf