CEs are due on your renew date every other year. You need 1 CE per month. Thats 24 Total CEs. The date due is based on your birth month, same as your certification renewal. When you renew you have to state if you have done the required CEs. You do not have to send them in, its based on an honor system. But...They can spot check you and If you fibbed on the form...well lets just say, I would not want to be in that situation.
If you certified in may of 2008, I hope you have some CE under your belt. If not I would get busy and make sure I had the required amount, up to date.
No idea about CA.