How does the Alliance Branding for Skinnr work?

So one of the recent expansions CCP discussed the use of Alliance or Corp level SKIN layouts. I’ve not actually seen any info on how this works so i have some questions.

My current understanding is you can target a SKIN to your own Alliance or Corp but each one sold still requires me to spend the 100 plex to produce them before i can list this. Is this still the case with the Alliance level system introduced in Legion? Or am i able to produce a SKIN at a 1 time cost which anyone inside the alliance can activate without having to spend 750m per pilot?