I thought maybe if you were ticketed on a US flight outgoing, that
status could be saved. I don't pay for it, but am frequently (80%)
granted TSA Pre status when I buy a ticket.
It seems to me that if you have traveled extensively within the U.S. since
2001, you should be TSA Pre all the time. Especially when you are over 60
years old....that's my guess as to why I rate most of the time.
--
An amateur practices until he gets it right. A pro
practices until he can't get it wrong. -- unknown