> Brian Carpenter wasn't an AD unless it was before 1989 so at least a 15 year gap. For the record, I was never an AD (before becoming General AD in 2005) but I had served for far too long in the IAB (1994-2002)**. So, a 3 year gap between the two. Which I for one was very happy with. I also served as a WG Chair while in the IAB, which was a feature not a bug IMHO. Of course, if an appeal related to that WG had come to the IAB, I would have needed to recuse myself. Regards Brian Carpenter ** If anyone cares at this late stage, I refused re-nomination in 2001 and 2006. On 22-Oct-21 07:33, Salz, Rich wrote: > With Mike's corrections and cutting off the limit at pre-1996 because the structure changed, we get: > > Lars was Transport AD until 2011; 10 years. > Aliisa was ART AD until 2017, no gap. > Jari was Internet AD until 2012; one year. > Russ was Security AD until 2007; no gap > Brian Carpenter wasn't an AD unless it was before 1989 so at least a 15 year gap. > Harald was Ops AD until 1999 so two year gap. > Fred Baker wasn't an AD before 1989 so at least a six year gap. > > Or, 10 0 1 0 infinite 2 inifinite ? > > I don't see how you can make a compelling argument that AD->IETF Chair must not have a gap year. > >