I am sure that you are familiar with the July 30th tragic balloon accident in Texas that killed all 15 passengers and the pilot. The NTSB report is here
https://dms.ntsb.gov/pubdms/search/h...=0&TXTSEARCHT=. A synopsis is at
https://en.wikipedia.org/wiki/2016_L..._balloon_crash.
Of special reading is the NTSB toxicology report which is particularly damning for this particular pilot. See
https://www.google.com/search?q=texa...utf-8&oe=utf-8 for some "Google" details.
The toxicology is important because, as I understand it, Balloon commercial operators are not required to hold a medical. I was talking recently to a commercial balloon operator friend of mine who is very plugged into this for obvious reasons. As I understand it, it is very likely that commercial balloon operators will be required to have medicals (of unknown class). He also said that during testimony the question was raised what other commercial aircraft operations do not require medicals. Glider operations was mentioned.
The implication is that if Balloon commercial operators be required to obtain medicals, then our glider commercial operations *MAY* also be required to obtain medicals.