If a building has a sufficient water supply and sewer available, the local authority may, subject to this section, by notice to the owner of the building require that any closets, other than water-closets, provided for, or in connection with, the building shall be replaced by water-closets, notwithstanding that the closets are not insufficient in number and are not prejudicial to health or a nuisance.
Where the local authority give a notice under subsection (1) above—
Where the owner of a building proposes to provide it with a water-closet in subsititution for a closet of any other type, the local authority may, if they think fit, agree to pay him a part, not exceeding one-half, of the expenses reasonably incurred in effecting the replacement, notwithstanding that a notice has not been given by them under subsection (1) above.
Sections 99 and 102 below apply in relation to a notice given under subsection (1) above, subject to the following modifications—