Section 41 deals with matters which must be provided for in improvement schemes; it reads thus: "Every improvement scheme shall provide for (a) the acquisition by the Board of any land, in the area comprised in the scheme, which will, in their opinion be required for the execution of the scheme, (b) the laying out or re laying out of the land in the said area; (c) such demolition, alteration or reconstruction of buildings, situated on land which it is proposed to acquire in the said area, as the Board may think necessary; (d) the construction of any buildings which the Board may consider it necessary to erect for any purpose other than sale or hire; (e) the laying out or alteration of streets (including bridges, causeways and culverts), if required; and (f) the leveling, paving, metalling, flagging, channelling, sewering and draining of the said streets, and the provision therein of water, lighting and other sanitary conveniences ordinarily provided in a Municipality.