In certain areas, the zamindar has a customary right to recover one-fourth of the sale consideration for a house sold by the riyaya. This is a customary right of antiquity mentioned in the wajibularz of the village. It is based not on contract or encumbrance, but arises only on sale. The riyaya has no saleable interest in a house in an agricultural village, but such a right is given to him on the understand­ing that if he leaves or abandons it, the zamindar gets one- fourth as zare chahorum. This custom was acknowledged because in settling the house, the zamindar had to make certain investments. The custom is not unreasonable or op­posed to law. Which of the following statement will apply?