In this part—
"aggrieved person" , for a decision, means—
(a) the applicant for the application for which the decision was made; or
(b) for a decision substituting a person as a relevant person for the application—the person who is the substitute.
(a) the rejection of the application;
(b) the withholding of permission to change the application;
(c) the imposition of conditions on permission to change the application;
(d) the substitution of a person as a relevant person for the application.