This is really difficult situation. Either John and Sylvia are blind to what they've done or, they're being falsy accused. Will there be some sort of hearing where both sides are presented?
The Safesport Code can be found here
and the procedures for appeal are found starting on page 8. Zimmerman has asked for an appeal and has a right to a hearing before an arbitrator. The parties have the right to present evidence. This is based on a very quick review and you may want to look further if you want more details. I only know what is in this document.
And to answer questions you have had before, Mr Rice, USFS has a SafeSport Handbook, and the handbook requires pretty much anyone in a position of authority (including not just coaches, but chaperones, "lead volunteers", and others) to complete SafeSport training and comply with SafeSport guidelines: (p. 12 for covered individuals)