Ok being a Scot, feudal land tenure was not abolished until 2002. While the concept of Fue duty was not abolished until 1971. Here is what happened in a legal framework. When ever a piece of land changed hands, the legal term was to dispone. So you either sold a piece of land "do hereby sell and do dispone" or you sold it and kept rights "do hereby sell and in feufarm do dispone". When land was sold in feufarm the seller maintained ultimate title on the land, and was the feu superior (he may of intrun had a higher feu spuperior). Prior to 1971 the enjoyed the right to take an anual payment for the land. Although they could ask for other rights, I saw one feu charter (the document where a feu superior grants title to the land) where the buyer had to supply a bag of oats every year to the local minister. There is no limit to the size of land you could parcel out, although the value of feu duty you could ask for really depeneded on the size of land. A single flat would command a very small feu duty while a larger farm could command quite a substantial feu duty.