Hi,
As far as I know, Sun have recently imposed that two year rule on all their exams. I think it's in an effort to force people to do update exams for newer versions of Java/J2EE.
I don't think though that they want to stop people saying they have SCJP2, just qualify it with the version of
Java that you are certified on, SCJP2 1.4 etc.,
Cheers,
Kem