Situation: A squad of (jet)bikes has several Markerlights on them. The tau player is about to shoot at them with some Plasma or other weapon w/ low enough AP to punch their armor.
Does the Tau player have to declare Markerlight usage before Bike player Jinks? Or do the Bikes have to declare Jink before finding out whether the Tau player is going to use the Markerlights to ignore cover?
I am ONLY concerned with 7th Edition rules. 6th Edition was clear cut as Jink was automatic.
ETA: Jink (7th Edition):
When a unit with any models with the jink special rule is selected as a target for a shooting attack, you may declare that it will jink. the decision must be made before any of the to hit rolls have been made. If the unit jinks all models in the unit with this special rule gain a 4+ cover save until the start of their next movement phase, but they can only fire snap shots until the end of their next turn.