There are two things to consider:
- What the White Council considers breaking the laws and
- What the rules consider breaking the law towards the Lawbreaker 'Power'
This view is enforced in the text on
You could say that the Laws exist as two separate concepts with 99%
overlap—the Wardens of the White Council enforce one concept (law),
while reality metaphysically enforces the other (nature).
The first one is pretty well set out in terms of targets on
The White Council has made clear that their Laws don’t apply to
entities that aren’t people. The Laws of Magic are strongly oriented
on protecting the lives and rights of mortals. Creatures and folks
that the Council might classify as “monsters” are fair game. With
that said, this is a rule of thumb where it’s easy to stumble into the
grey area, with things open to interpretation by the Warden on the
scene—and given that Wardens have a lot of latitude regarding the
whole “judge, jury, and executioner” bit, it’s a grey area that you
want to avoid stepping into as a spellcaster.
This doesn't seem to indicate casters, but in truth, I think it does. It falls into that 'grey area' mentioned in terms of targets, i.e. if it is possible that the Seelie Court (or Sponsor) will step in to take exception to their subject having their head removed from their shoulders and it can be proven to be so (Marked by Power, anyone?), then that will give Wardens pause. Then again, if the Laws of Magic don't apply as a caster- they also don't apply as a target, making the caster a valid target outside of White Council influence under the case of 'aggressive self-defense' or somesuch.
In terms of the second part, it becomes even grayer, but I think it can be solved with a judicious look at aspects. If the changeling has not made the choice, they count as mortal for purposes of the game. The same with Sponsored magic users. So I'd think that the rules part would apply in both of those cases.
Again looking at
Whenever you choose to break one of the Laws of Magic, you’re crossing
a very real line. By taking such an action, you’ve altered your
self-image and your beliefs—the very basis of you—to be the sort of
person who breaks that Law.
Though this is flavor text, it does point to the view that its based upon what the psyche of the character identifies as - mortal or not.
Now, if the mage is an Emissary of Power because he's explicitly not mortal, that's a different story. A lesser demi-god of some long lost power is decidedly not going to have the same worldview as the mortal emissary of the same.