Key facts: ORS 311.405 makes Oregon property tax liens perpetual and non-expiring; tax liens survive the decedent's death and attach to inherited property; estates exceeding $50,000 gross value require full probate administration; the 30-day waiting period applies to creditor claims after proper notice; ORS 312.020 authorizes county foreclosure on tax-delinquent properties; federal tax liens under 26 U.S.C. § 6323 also survive property transfer.