i'm a CI, so i don't quite fall into your suggestion - though i take the view that if its about showing a good example to cadets, then it should be all the staff, particularly given that CI's make up the majority of staff in the ACO..
i'm 42, i can run 8km in 40 minutes and carry a fully loaded 80ltr rucksack for 60km through Snowdonia in 16 hours - i'm pretty fit, i would pass the RAF fitness test for a 20yo let alone that for a 42yo - so i'm not going to have a problem with whatever ACO test was devised...
however, firstly i would consider it a bloody cheek for an organisation that i give my time to to demand that i prove myself able to a job i have been doing quite ably for some years, and secondly - given the ACO's famous inablity to do anything simply - i just know that this fitness test won't be done during a spare 5 minutes on a Sqn sports evening, but that i'll have to attend my 'local' RAF station (5 1/2 hours round trip...) on a weekday to do under the supervision of a PTI.
so, no thanks...
more importantly perhaps, is whats your cunning plan for dealing with the - wild ■■■■ guess - 70%+ of ACO staff who would fail the current RAF fitness test for someone of their age?
what happens if they refuse to take the test and tell you to get lost?
what happens if they fail the test - how many goes do they get and over what time scale? what support will you put in place to allow someone with a 40+ hour a week job, crap diet, two kids, a marriage etc.. to eat healthier and do more exercise?
are you really going to kick out the fat bloke who does all the boring paperwork and drives the minibus - for free - when he tells you to poke your running shorts?
theres a Sqn about 40 minutes from me - and incidentally, about 30 minutes fast drive from the next nearest Sqn - where not one member of staff would pass the current fitness test for a 50yo man, let alone for the 30yo's they are. if by some miracle they managed to get 50% of their staff through the test they'd have 3 members of adult staff, and the Sqn would probably have to fold. what are you going to do?