Unrealised rent

For the purposes of the Explanation below sub-section (1) of section 23, the amount of rent which the owner cannot realise shall be equal to the amount of rent payable but not paid by a tenant of the assessee and so proved to be lost and irrecoverable where,- (a) the tenancy is bona fide; (b) the defaulting tenant has vacated, or steps have been taken to compel him to vacate the property; (c) the defaulting tenant is not in occupation of any other property of the assessee; (d) the assessee has taken all reasonable steps to institute legal proceedings for the recovery of the unpaid rent or satisfies the Assessing Officer that legal proceedings would be useless. C. - Profits and gains of business or profession