i work for a honda dealer and for the most part the seatbelt and automatic motor assembly should be covered AFAIK. i have done quite a few repairs to accords(similar vintage as your friends 'teg) and they were covered. find another dealer if they don't want to cover it.
What specific problem is your friend having with his belts?
__________________
.
.
Liar, you couldn't cut me deeper with a knife if you tried
.
.
.
.