OBR Aviarch Spymaster - 1 command point?

[daf]

I have a question regarding Aviarch Spymaster ability available for Katakros.

It says: Once per turn you can roll a dice when your opponent receives a command point. If you do so, on a 4+ that command point is lost.

I’m struggling to understand the meaning of „once per turn”.

Does this mean I can make a roll for just one command point my opponent receives (e.g. at the beginning of their turn/hero phase) and if they get more in the same phase, I can’t make any rolls or I can make rolls for all command points they receive in a single phase (e.g. they get 1 command point at the beginning of their turn/hero phase and then in the same hero phase they use a special ability to generate additional CPs)?

 

[Kadeton]

During each turn of the game, you can use the ability to roll once. If your opponent generates more than one command point, you can still only roll once.

[daf]

So saaad. Looked like a nice weapon against armies with multitude CPs.

Thank you!