Section 106(1) of the Town and Country Planning Act 1990 (TCPA 1990) provides as follows: ‘(1) Any person interested in land in the area of a local planning authority may, by agreement or otherwise, enter into an obligation (referred to in this section and sections 106A and [106C] as “a planning obligation”), enforceable to the extent mentioned in subsection (3)— (a) restricting the development or use of the land in any specified way; (b) requiring specified operations or activities to be carried out in, on, under or over the land; (c) requiring the land to be used in any specified way; or (d) requiring a sum or sums to be paid to the authority [(or, in a case where section 2E applies, to the Greater London Authority)] on a specified date or dates or periodically’ Provided