I've done a Google search for the exact phrase, "engaged in a minimum of five years' education under the age of 18 within the territory of the relevant association", and the only results really are either media releases relating to Andrew Driver or links to forum threads discussing him. There are one or two relating to Arteta but nothing remotely official from FIFA or the SFA, FA or whoever. Who knows? Do you have any contacts in the IFA you could ask about it? If it's some private gentleman's agreement between the British associations made possible by that additional clause in article 6, maybe they'd be aware of it?
Yesterday, I had a Liverpool fan telling me that Liverpool were going to receive an automatic buy into the Champions League in the place of Fenerbahce, who the Turkish association had decided to decline nominating as their representative as a result of proven match-fixing allegations that were made against them. He assured me this would be the case because Liverpool were the "highest ranked team not in the competition", it was trending on Twitter and that's what he’d heard the rules said... This all failed to take into account that UEFA can't just deny a member association its nomination, of course. When I pointed this out, another chap then told me that the Turkish association were having their nomination stripped from them because Trabzonspor were also being investigated as part of the scandal. Of course, it all turned out to be complete and utter baloney; UEFA announced a short while later that Trabzonspor were to be nominated as the Turkish representatives in Fenerbahce's place. I'd actually expected Kayserispor to be nominated as the next best-placed Turkish team who hadn't qualified for or begun playing in European competition already this season, but at least Trabzonspor's nomination still made sense to me. I suppose the point is that I don't trust anything that is reported any longer in relation to supposed FIFA/UEFA statutes and rules when anyone and everyone seems happy to fall for the gossip and rumour. Same thing with the whole "Arteta for England?" saga. I don't know if he mentioned it publicly at the time, but I'm sure he wouldn't mind me saying - it wasn't anything major and I thought it pretty cool actually* - but that story actually broke as an exclusive in one of the major English papers after our very own Stutts had a legal friend of his contact FIFA's legal department to clarify matters after deliberations on this forum. FIFA confirmed our thinking was correct and I think his pal then contacted the media about it. It was interesting actually, because I recall the particular paper - can't remember exactly which - spun it from an anti-Capello perspective; "incompetent Capello didn't even realise Arteta wasn't even eligible" sort of slant...
*Even if it did crush poor Arteta's hopes and dreams. :p