Is it permissible to charge a fixed fare for public transportation—for instance, “Fourat” minibuses—regardless of the distance traveled or the duration of the journey?

For the validity of a rental contract, knowledge of the rent and the usufruct is required to avoid ambiguity that leads to dispute. The issue in the described scenario is not with the rent, but with the variation in usufruct. However, the lessor has the right to determine the rent they are satisfied with. The lessor has agreed that the rent for a long distance is the same as for a short distance. This unification makes it unnecessary to mention the distance, and it is similar to overlooking the ambiguity of the duration and the quantity of water used in a public bath.