From the web, BSA Chemical Fuels Policy
Prohibited Chemical-Fueled Equipment
Equipment that is handcrafted, homemade, modified, or installed beyond the manufacturer’s stated design limitations or use. Examples include alcohol-burning “can” stoves, smudge pots, improperly installed heaters, and propane burners with their regulators removed
Chemical Fuels not Recommended
Unleaded gasoline; liquid alcohol fuels, including isopropyl alcohol, denatured ethyl alcohol, and ethanol; and other flammable chemicals that are not in accordance with the manufacturer’s instructions for chemical-fueled equipment.
There have been several threads on this site about this topic.
Looks like homemade and pepsi can stoves are banned. A commercially manufactured stove like the Trangias sold at REI would be allowed. Alcohol sold as a stove fuel while not recommended would allowed. Everclear would most likely be banned since it is also a beverage. The irony here is during our trek on our last night with the Ranger, he pulled out a pepsi can stove and served up a dessert for the crew with it.
And as always if the worst case happens, and you are not in compliance with BSA safety policies, BSA liability insurance will not cover you in the event of lawsuits.