I just got a letter from Ilona Maine informing me that I need to "re-certify" my A-10. I can't find the requirement to re-certify in the
AMA experimental documents (520-A/B/C), other than the "Permit expires date" on the Permit to Fly list. Looks like the date is always 1 year after initial certification. There is a list of reasons to "suspend" the Permit to Fly, such as after a major modification or crash, and if the airplane "has not been flown for a period of twelve months". Seems funny to have that last one if you have to re-certify after 1 year anyway.

FYI for when you "re-certify", the Permit to Fly form is new as of January 2009. Similar to the old one but with a few additional fields.

Looks like David and Joe are good until August but Billy is due in Feb.

Craig