( 1. ) IN this Letters Patent Appeal upon a certificate granted by a learned Single Judge of this Court under Clause 10 of the Letters Patent, the question raised is as to the interpretation of section 12 (1) (f) of the Madhya Pradesh Accommodation Control Act, 1961. It is directed against the decree, dated 9-4-1973, passed by the learned Single Judge in Civil Second Appeal No. 274 of 1971, arising out of the decree, 14-10-1971, passed by the Additional District Judge, Ujjain, in Civil First Appeal No. 11-A of 1971, arising out of the original decree, dated 16-11-1970 passed by the 1st Civil Judge, Class I, Ujjain, in Civil Suit No. 192 A of 1969.

( 2. ) THE relevant facts for understanding the question involved in this appeal are as follows. The respondent is the landlord of house bearing Municipal No. 1/302/b, situated in the city of Ujjain. The predecessor of the appellants, Pannalal, was the tenant, who held two different portions of the house as a tenant on a monthly rent under two separate contracts of tenancy. One of them related to the residential accommodation, while the other related to the non-residential accommodation for business purposes. The monthly rent of