3Subject to the following provisions of this Part of this Schedule, where by virtue of paragraph 2 the old development plan for any district is treated as being comprised in a development plan for that district—
(a)if there is a conflict between any of its provisions and those of the structure plan for that district, or, in the case of Greater London, the Greater London Development Plan the provisions of the structure plan or, as the case may be, that Plan shall be taken to prevail for the purposes of Parts III, V, VI, VII, VIII and IX of this Act and of the M1Planning (Listed Buildings and Conservation Areas) Act 1990 and the M2Planning (Hazardous Substances) Act 1990; and
(b)if there is a conflict between any of its provisions and those of a local plan, the provisions of the local plan shall be taken to prevail for those purposes.