AND... in some US States Registered Architect is legally obligated to
maintain active drawings for his/hers projects for a period of 10 years
after retirement.
Update: ArchiCad 19 - Permanent, Full Commercial US License; Box, Discs
& Hardware Key is still available, email me at krysmark@mac.com.Or see
it on eBay; https://www.ebay.com/itm/147254685200