CPS stands for “Certification Practices Statement.” There’s also a document called the CP, or “Certificate Policy.” I know, it’s very confusing.
Can I ask, what is the problem you are trying to solve? Is there a regulatory compliance issue that requires you to document key strength for your entire certification chain?
Curiosity: I found out that the Root CA has no CPS at all, and the intermediate CA has a conflicting CPS (that seems to belong to a different CA, actually).