AT&T refuses to provide PTR records?

["David Hubbard" <dhubbard () dino hostasaurus com>]

Anyone familiar with AT&T's policies on PTR records
for their customer-assigned address space?  We have a
customer whose website we host that has their own
in-house mail server that they run off of their AT&T
internet connection at their office.  We handle the
DNS for their domain name.  AT&T is refusing to set
up PTR records for them because they're not handling
DNS for the domain name.  Is this normal?  I haven't
dug through the ARIN agreements but I thought it was
required to provide reverse DNS on your allocations.

Thanks,

David