To grant levels to veteran account, both your RAF accounts will need to be linked to it.
So Vet acct recruits RAFAccount1
Vet acct also recruits RAFAccount2
Then lvl 80 on veteran boost 2 lowbies, 1 from each RAF account.

Once 60, they can each grant 29 levels to any character on your vet account that is both below them in level and below 60.