Section 3.7.5 of the Registrar Accreditation Agreement requires registrars to delete domain registrations after a second notice and a grace period, unless there are “extenuating circumstances.” Some examples of such “extenuating circumstances” might include ownership disputes, payment disputes, or lame server delegations. Only the registrar would know exactly why it hasn’t yet deleted a particular name. No specific dates or deadlines are prescribed in the current provisions.

ICANN has not yet adopted a uniform policy concerning the handling of expired domain names. If you’re interested in helping to craft such a policy, you can learn more about ICANN’s bottom-up, consensus-based process for making new policies at ICANN’s website.