(1)If an owner or occupier of any land affected by a railway considers the works made under section 16 to be insufficient for the use of the land, or if the State Government or a local authority desires to construct a public road or other work across, under or over a railway, such owner or occupier, or, as the case may be, the State Government or the local authority may, at any time, require the railway administration to make at the expense of the owner or occupier or of the State Government or the local authority, as the case may be, such further accommodation works as are considered necessary and are agreed to by the railway administration.