Why does example power "STUN Transfer" have Trigger?

[SuperKlaus]

Hi, your work on 6th Edition is excellent. I don't understand, though, why "STUN Transfer" on 6E1 has a Trigger Advantage on the Aid. Isn't it already part of being Linked to Drain STUN that the Aid will be used simultaneously? And already part of Linked that the Aid can't be used unless the Drain hits its target?

[Steve Long]

Re: Why does example power "STUN Transfer" have Trigger?

 

Given that the Drain and the Aid are being used on entirely separate targets, the Trigger is an appropriate method for representing how the power's supposed to work without causing any potential rules problems.