My husband and I got into an rental agreement with our tenant (for our residential property) in the year 1997. It has been 12 years and we have not revised the rental agreement. Also, during the same period in time there has been no hike in the rent paid by the tenant. The tenant claims that since, there was no clause in the rental agreement pertaining to an increase in rent, he was not expected to pay any increase. Would the tenant be correct in making this claim? Kindly do guide us on this issue. Thanks.