15   Notice of placement etc of permanent mark to public authority charged with maintenance

(1)  The Surveyor-General shall, where necessary, give notice, in writing, of the placement, adoption, establishment, removal or alteration of any permanent mark to the public authority charged under this Act with the maintenance thereof.

(2)  The Surveyor-General shall give notice, in writing, to the Registrar-General of the placement, adoption, establishment, removal or alteration of any permanent mark in any case where the Surveyor-General considers that the placement, adoption, establishment, removal or alteration thereof is likely to affect any plan lodged or retained in the office of the Registrar-General.