I think what you find at local level, as it is meant to be 'fun' and are often run by charities or individuals for their own gain, anything is, for the most part, allowed to enter everything.
I have sent stewards scuttling back to the secretary to say that there is a such and such in the ring, and it really should'nt be, only to be told there is not really anywhere else to put it, and just do the best I can. I hate doing foreigh breed classes as I am not up to press on what the breed standard is, so I have to look for what I would expect to find in my idea of correct conformation and straight movement, and if some are by breed narrow with an upright shoulder and boxy feet, I may not be aware of that, and as I dont think it is correct, then I apologise, I cant be an expert on everything, and at that level, I do find I get everything thrown at me over a season, if you want a panel judge for your rare foreign breed, go to the appropriate breed show.
I've had natives plaited up, natives in riding pony classes, and peoples idea of hacks and hunters beggars belief. I do the best I can, and offer gentle advice, whether people choose to take it or not is their concern.
I had one unpleasant individual have a go because the horse I chose to place first in a sport horse class was unplaited, and we did'nt do the class on a triangle or have 2 judges, it was a local level show, it was the best 'type' in the class, and the fact the ring was too narrow for a triangle and on a slope at that went way over the top of her head.
I chose to judge only at that level not because I am a dummy, but I have no desire to get involved in panel judging, you only have to read some of the comments on here to see that being on a panel does not, according to some, make you a demi-god, I feel strongly that if I am showing at County/National level with my ponies, I'm best staying out of the politics, thats my view, and I can concentrate on helping those who do wish to improve and go forward to a higher level, after all, that is where I started as a small child with no pressure and just enjoying my day and hopefully learning how to do better.
And without wishing to sound rude, I whole-heartedly wish people who watch and compete in workers would get their heads round the fact that because a pony jumps clear it is not neccesarily the outright winner, an animal that tows its rider into every fence, star-gazing and cat leaping over every fence and then finishing its atrociously ridden but astoundingly clear round with an out of control gallop is not superior to a nicely ridden and well balanced display with one mis-stride and a knockdown. Would I expect a child to have a good days hunting on such an animal? NO! Would I scramble aboard and not have my back teeth shaken loose by it? NO. Could I expect it to keep its head in a large field of 70+ horses on a great run or wait quietly and mannerly for me to find a gap to get in and jump that hedge or move responsively to one side or the other to quickly avoid the stopper two stride in front of me? Highly unlikely!
Is its conformation movement and temperament suitable to enable it to travel safely over meadow, moorland and plough safely? I draw my own conclusions from my many years in the field on that one.
A good working hunter has to have a d**n sight more about it than the ability to screw itself over a few fences in a show ring.
I judge local level - and I know the native breeds - I have been breeding ponies for over 30 years and it is nice to give something back to local riding clubs - where you can encourage people and give advice so that those with good ponies can, hopefully, go on to a higher level. Riding clubs don't normally have 'qualifiers'? 
No need for panel judges for those.
