Properties round here have come up with Agricultural Occupany clauses on them. I know some of these houses were built as farm workers dwellings, often for farmers sons and family. Quite a few try to get it lifted, but its refused - or at least round here. I suppose the council look at it, that they allowed the building, often in a green belt, for the purpose of the farm. And now the owner is changing the goal posts, and can sell the house for a good sum with the clause lifted.
To be honest, I would say the owner has tried to get the clause lifted already. He will know the place would make more money.
As I understand it, you last paid employment must have been in agricultural or forestry, which means farm worker, or owning your own farm. So, a retired farmer could count probably.
I would say, even if you got a property with this occupancy clause on it and worked the farm, its when you come to ever sell it. I would imagine it could be hard to find a buyer.