In which regions a specific conversion is allowed to occur and in which regions it is not
allowed.
How many years (or time steps) the land use type at a location should remain the same
before it can change into another land use type. This can be relevant in case of the regrowth
of forest. Open forest cannot change directly into closed forest. However, after a
number of years it is possible that an undisturbed open forest will change into closed
forest because of re-growth.