Anything that can be done locally, is done locally. Oversight on activities that pose greater risk – camping “nights away permits”, or use of national governing body training schemes, RYA or British Mountaineering Council for example – saves reinventing the wheel.
Expecting an experienced person to revalidate a classroom activity like radio or MOI (methods of instruction?) seems like overkill. If you are working within the limitations of Ofcom radio licensing what is the point in trying to gold-plate everything?
Our badge requirements are a guide and worded very broadly, many of the suggested activities can be a little underdeveloped. The program has changed somewhat over the years so scout leaders will continue to use lessons/instruction for a badge last issued 40+ years ago. It is all the same really – know how to light a fire, know how to cook on the fire, know how to clean after, pitch/strike tent. Let them make a few mistakes then use that as a teachable moment.
Since the death of Ben Leonard on Great Orme, TSA has been meticulous in drilling writing and following risk assessments into our adults. We teach it to the young people as well.
Each group is quite independent of district and county (bit like your wing/sector), so provided your group is functional you can get a decent amount done without too much interference. If you are feeling brave there is nothing stopping you from banding together with neighbour groups and run an activity that would benefit from pooling resources and demand.
I am fortunate to be allowed to just get on with it. The scouts enjoy it and fellow leaders appreciate the effort.