This section applies to any person who or body which exercises any function—
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under Part 2 of this Act in relation to local development documents;
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The person or body must exercise the function with the objective of contributing to the achievement of sustainable development.
For the purposes of subsection (2) the person or body must (in particular) have regard to the desirability of achieving good design.
For the purposes of subsection (2) the person or body must have regard to national policies and advice contained in guidance issued by—
the Secretary of State for the purposes of subsection (1)(b);
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