(1) All public drains, all drains in, alongside or under any street and all sewage disposal works whether constructed out of the Corporation Fund or otherwise and all works, materials and things pertaining thereto which are situated in the municipal area shall vest in the Corporation.
(2) All public and other drains which are vested in the Corporation are hereafter in this Act referred to as Corporation drains.
(3) For the purpose of enlarging, deepening or otherwise repairing or maintaining any such drain or sewage disposal work so much of the sub-soil pertaining thereto as may be necessary for the said purposes shall also be deemed to vest in the Corporation.
(4) All drains and ventilation-shafts, pipes and all appliances and fittings connected with the drainage works constructed, erected or set up out of the Corporation Fund in or upon premises not belonging to the Corporation whether ––
(a) before or after the commencement of this Act ; and
(b) for the use of the owner or occupier of such premises or not, shall unless the Corporation has otherwise determined or does at any time otherwise determine, vest and be deemed always to have vested in the Corporation.