ACSM Clinical Exercise Specialist - what hours may be counted towards certification?

I understand that you need experience in a "clinical exercise program". Has anyone looked into whether these have to be hospital-based programs?

My experience is in a "Bootcamp" group fitness setting. This did include exercise testing, prescription, supervision, counseling, and education. What we did not do any ECG monitoring and did not work with many cardiac patients.

I intend on working with special populations (cancer, post-rehab, etc.) and I debating whether I should go for the CES or HFS. My understanding is that CES work with patients in hospital-based programs that may be unstable, while HFS work with stable individuals. In any case, if my hours from group fitness would count towards certification, I would rather go for the higher credential.