Got a Link? IPv6 has privacy issues however I was not aware of this?
ARIN is the organization that serves as a coordinator for assigning IP addresses.
from that page:
ARIN will send an invoice for the annual renewal fee approximately 60 days before the fee is due. Organizations must pay their annual subscription renewal payment by their due date in accordance with the RSA(link to PDF).
If not paid according to those terms, the address space will be subject to revocation and ARIN will no longer consider the organization a General Member in good standing. All renewal and maintenance due dates are the end of the anniversary month.