The product is on the market and is available to everyone. If a private promoter wishes to run a series with it, there is nothing that the FIA can do to stop it 
The series states that it’s an arrive and drive system ran on IAME OKN & KR Chassis for the Juniors and Seniors and TM GR3 & Parolin for the Minis. It’s the same principle that we use for our own FIA Karting Academy, which is on Vortex OKJ & Exprit chassis.
This isnt accurate though. They are calling it OKN when it isnt. It is run under FIA jurisdiction and thus should adhere to the nomenclature set out by the FIA.
I cant run a championship titled World Championship under almost any circumstance where the FIA has some influence. Drivers explicitly are told they cant call themselves World Champions if they aren’t if they are FIA licenced. Drivers weirdly arent regulated on this… but championships most certainly are… even those who arent run under the FIA are put under extreme pressure (i know from personel experience)
Yet a championship can undermine thr FIA’s own regulatory structure and call a class something it isnt. It may happen to use a homologated engine but that doesnt make it OKN. I dont see the FIA calling their Academy OKN or whatever. Its just the FIA Academy. CoF may say the engine happen to be an OKN engine… but the class cant be called that. CoF Academy or whatever but not OKN
The only enforceable trademark we have is the “World Championship” title, which no other series or event can utilize. You are correct, in that the only world champions come from FIA Events and nothing else. ¨
Nevertheless, all other nomenclatures within our regs are not trademarked and cannot be defended. Nothing is technically stopping a tire manufacturer from calling a tire model “Option” or “Prime”, without it being homologated by the FIA.
I kind of align with you in the protection of our regs and nomenclatures, but no steps have been taken as of today to legally protect them.
You dont need trademark. You are the licencing authority and thus can simply phone them up and say ‘call it something else’. Its a contractual agreement between parties. Otherwise any championship could call their Rotax Max grid Senior OK or even KZ with no rebuke from the FIA. It makes little sense. It basically means the FIA regulations dont exist.
I am not sure you can trademark world championship as a term. I suspect it is only trademarked in association with the FIA. We have multiple World Champion (boxing etc…) titles with varying governing bodies for the same sport.
I am pretty sure if I set a governing body and our own World Championship event the FIA couldnt do anything. Its no different to SuperMotocross World Championships vs FIM World Championships.
But veering from the main point. Yes the FIA absolutely have the power to tell CoF “you have to call it something else” otherwise OK-N doesnt actually exist