Mehra at a monthly rent of 2,650/-. With respect to the plea in the plaint that rent was increased by 10% every three years in terms of the unregistered lease-deed dated November 21, 1991 and that so increasing the rent every three years, entire rent for the duration of the lease of 11 years and 11 months was paid, it was pleaded in the written statement that the rent was never increased from 2,650/- per month, for the reason, in law, the landlord was required to give notice to the tenant of her intention to increase the rent in view of the provisions of Section 6A and Section 8 of Delhi Rent Control Act, 1958, which notice to increase the rent was never given by the plaintiff or Neeta Mehra to the defendant No.1. It was pleaded that being an unregistered document, the lease-deed dated November 21, 2011 and/or its clauses, including the clause relating to increase of rent, cannot be looked into. Admitting that 4,39,224/- was paid to Neeta Mehra : 3,73,340/- by cheque and 65,884/-, deducted as TDS and deposited with the Income Tax Authorities and certificate to said effect given to Neeta Mehra, it was explained that the advance rent was for a period of approximate 14 years, calculating the rent at 2,650/per month. It was pleaded that the tenancy was not one from month to month but was for a duration of 14 years for which rent in sum of 4,39,224/- was paid in advance. It was further pleaded that the defendants paid 19,95,523/- as Pagri and the defendants had spent 25,00,000/- towards renovation and repair of the suit property. It was pleaded that under the lease-deed dated November 21, 1999 the defendant had an option to have the lease renewed for another duration of 11 years. It was pleaded that the suit was barred under Section 50 of the Delhi Rent Control Act, 1958 for the reason the rent of the suit premises was less than 3,500/- per month. Receipt of the legal notice dated May 03, 2010 was admitted and so was the response given thereto.