This issue of whether Etihad, Etisalat or any other Abu Dhabi company is a related party is a complete red herring.
The accounts aren't rendered fraudulent or misleading if they are deemed to be, and we didn't declare them as such. The definition of an RP is partly subjective but there's no obvious way that Etihad and Sheikh Mansour are related parties. Etihad and City definitely aren't.
The red cartel have got their knickers in a twist over this, and I suspect that at least partly due to them wanting to see the value of the Etihad sponsorship (assuming we'd have to declare that if it was an RPT).
FFP allows investment, including via commercial sponsorships, from owners and other related parties, as long as these are deemed to be at FMV. PSR doesn't say anything about this. CAS said that (at the time of that hearing) that Etihad was FMV and not disguised equity funding. As long as that's the case, the issue of whether it's an RPT is irrelevant.