I think this will be simpler than we anticipate for most, It just seems over explained for some reason with confusing wording that really doesn't help.
Only thing they haven't properly clarified is who gets emailed the access codes. As an example, I applied for 3 codes through my friends and family on my account as I'm always the one that sorts away tickets out and cup games etc. the email suggests to me all access codes will be sent individually to the account holders registered email instead of sending them all to my email as the one who "purchased" the access codes creating a massive ballache. The entire point of applying for them on my account was so I could be in control of purchasing all 3.