(1) No allowance shall be made under section 552 -
(a) in the case of a disposal by means of assigning a lease of land or other property, for any liability remaining with or assumed by the person making the disposal by means of assigning the lease which is contingent on a default in respect of liabilities thereby or subsequently assumed by the assignee under the terms and conditions of the lease;
(b) for any contingent liability of the person making the disposal in respect of any covenant for quiet enjoyment or other obligation assumed -
(i) as vendor of land or of any estate or interest in land,
(ii) as a lessor, or
(iii) as grantor of an option binding that person to sell land or an interest in land or to grant a lease of land;
(c) for any contingent liability in respect of a warranty or representation made on a disposal by means of a sale or lease of any property other than land.
(2) Where it is shown to the satisfaction of the inspector that any contingent liability mentioned in su
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