It depends. (<- This is such a common response to systems engineering questions that I consider it a stand-alone punchline to a joke. Like "to get to the other side" or Rickrolling or "Assume the cow is a sphere.")

If you're looking for specific information related to a single certification level, you'll appreciate that it now has a separate page for each: ASEP, CSEP, and ESEP.

If you're looking for a page dedicated to being a reference? Got it!

Want to make sure you've read all the pages on the website and not missed a thing? Check out the Quick Links from the main certification page and you'll cover everything. 

And if you thought the certblog deserved more traffic, more awareness by the public of its existence, then you may appreciate that www.incose.org/certblog is now linked to the main certification page, www.incose.org/certification. Finally, the recognition it deserves!