Explanation:

Section 9(2) to Haryana Urban (Control of Rent and Eviction) Act, 1973 – 
(2) If the landlord at the written request of the tenant fails to agree in writing to provide all or any of the amenities within a period of thirty days or fails to provide the same within a period of ninety days of such request, the tenant may apply to the Controller for that purpose. The Controller may, on such application by the tenant and after such enquiry as he may deem fit, permit the tenant to have such amenity at the cost of the landlord on such conditions as he may deem proper. The tenant shall be entitled to deduct the expenses incurred by him in providing the amenity from the rent payable to the landlord till the full amount is realised :
Provided that the rate of deduction of such expenses shall not exceed fifty per centum of the amount of rent :
Provided further that the Controller may reject the application if he is satisfied that such an order will cause undue hardship to the landlord, keeping in view his source of income, or would involve expenditure incommensurate with the benefit sought to be achieved.