The 'periphery' of a regional centre in a strategic plan must be assessed by reference to the existing outer boundaries of the centre at the time of the application, not by reference to speculative future expansion over the life of the plan. A 'dynamic' or elastic periphery that stretches to accommodate a development application is inconsistent with the purpose of planning. The Coty principle permits but does not require consideration of draft planning instruments; inconsistency with an advanced draft strategic plan is a significant factor against approval but does not automatically require refusal. Misconstruction of a draft strategic plan can constitute an error of law where the plan has legal significance through the Coty principle and relevant statutory provisions.
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