Hi Jo Ann,
it is my understanding that courses need to be approved by certifying organizations. ACE, for example, has a process through which they approve such courses, and here is a link to it https://www.acefitness.org/about-ace/partners/continuing-education-provi….
I would think that, once you have the approval of one organization, it will be easier for a participant in your class to petition for their own organization. A lot of courses are approved by multiple certification providers. If you look at this website under CECs http://www.ideafit.com/fitness-education, you will see plenty of examples. The different organizations may award a different number of CECs.