This question is coming from me, someone who was in from the start but missed a few years by "being dead".
Suppose I have an AdSense unit named 123ABC and it's the right type, color scheme, etc. for my needs.
I create a new page and want another ad unit just like 123ABC. Is it OK to simply copy and paste the ad code for use on the new page or should I return to AdSense and get "new" code, even though it's going to appear the same?
FarmBoy