151. In this Chapter “development subject to confirmation” means—

(a) local authority development of a class prescribed in regulations under subsection (1) of section 153,

(b) State authority prescribed development that does not require appropriate assessment or environmental impact assessment, and

(c) Chapter 6 State authority emergency development in respect of which compliance with sections 158 and 160 is required pursuant to an order under subsection (1) of section 155.