284.—In this Chapter—

"material alteration" means a requested alteration—

(a) that the Board determines, under subparagraph (i) of paragraph (a) of subsection (5) of section 297, is likely to have significant effects on the environment,

(b) in respect of which the Board determines, under subsection (4) of section 177U, that an appropriate assessment is required, or

(c) that the Board determines, under paragraph (b) of the said subsection (5), would otherwise constitute a material alteration of the terms of the permission concerned;

"prospective applicant" has the meaning assigned to it by section 287;

"reasoned conclusion" has the meaning assigned to it by the Environmental Impact Assessment Directive;

"requested alteration" means an alteration of the terms of a permission under section 293 specified in a request made in accordance with subsection (1) of section 297;

"requesting person" means a person who makes a request in accordance with subsection (1) of section 297.]