Top management is thinking of creating/marketing a “new” credential to recognize people who are complete professionals, or Masters of [Content]. These people would be required to have the basic and intermediate credential (thus showing they know both the laws and how to manage or implement them) and an experience requirement of some sort. Would there be any barrier to us creating this new credential and would this affect the accreditation of the separate components used as prerequisites?

Not a problem.  Grouping them would not affect your other credentials.

If you want to create a ‘crown credential’, you could have a composite credential that requires:

1. Experience
2. Exam 1
3. One of Exam 2 or Exam 3 or Exam 4
4. A summary exam

This ‘crown credential’ would be able to be accredited under 17024.  It’s parallel to Oracle’s Certified Master program, or the Cisco Certified Network Engineer program or Citrix’ CNA (Certified Network Architect) program.

You could use any certification in step #2, and any other certifications as additional in step #3.

Whether you want to accredit the ‘crown credential’ or not is up to you.  If you don’t have an exam specific to the credential it would not be accreditable under 17024.