(1)When a demolition order has become operative, the owner of the building to which it applies shall demolish the building within the time limited in that behalf by the order; and, if the building is not demolished within that time, the local authority may enter and demolish the building and sell the material thereof.
(2)Any expenses incurred by a local authority under subsection (1), after giving credit for any amount realised by the sale of materials, may be recovered by them from the owner of the building, and any surplus in the hands of the authority shall be paid by them to the owner of the building.
(3)In the application of this section to a demolition order made in respect of a building comprising two or more parts separately owned—
(a)any reference to the owner of the building shall be construed as a reference to the owners of the several parts comprised in the building;
(b)without prejudice to the powers of the local authority under subsection (1), the duty imposed by that subsection on the owners of the several parts comprised in the building to demolish the building shall be regarded as a duty to arrange jointly for the demolition of the building; and
(c)subsection (2) shall have effect subject to the proviso that any sum recoverable or payable by the local authority under that subsection shall be recoverable from or payable to the several owners in such proportions as the owners may agree or, failing agreement, as shall be determined by an arbiter, nominated by the owners or, failing such nomination, nominated on the application of the authority or any of the owners, by the sheriff.