47.—(1) In calculating the disposable capital of the person concerned, the value of any interest in the main or only dwelling in which they reside shall be wholly disregarded.
(2) Where the person concerned resides in more than one dwelling in which they have an interest, the assessing authority shall decide which is the main dwelling and shall take into account in respect of the value to them of any interest in a dwelling which is not the main dwelling any sum which might be obtained by borrowing money on the security thereof.