PADMANABHAN, J. :- This civil revision petition arises under the Tamil Nadu Buildings (Lease and Rent Control) Act 1960 as amended by Tamil Nadu Act 23 of 1973, (for short the Act). The respondent is the owner of premises No.12 Mooker Nallamuthu St, Madras. The revision petitioners are tenants under the respondent in respect of a portion of the western side in the ground floor of the said premises. The said portion has been let out to the petitioners by the respondent for non-resident the purposes on a monthly rent of Rs. 600/-. The respondent is occupying a portion of the premises for residential purposes. The respondent is carrying on business in partnership with other family members in the name and style of T. S. C. Sanitaries in premises No. 128 Thambu Chetti St. Madras. Apart from the said business the respondent has also take up agency for Mercury paints and also distributorship for Colourcem for the State of Tamil Nadu and Pondicherry. The said premises in which the respondent is carrying on business belongs to one Abdul Khader, his brother. Since the respondent is not occupying a building of his own for carrying on business he filed H. R.C. 308 of 1980 on the file