In this part—
"costs" —
(a) for a P&E Court proceeding of the following type, includes a party’s costs to investigate, or gather evidence for, the proceeding that the P&E Court decides the party reasonably incurred—(i) a declaratory proceeding about the lawfulness of land use or development under the Planning Act , including any order under section 11 (4) ;(ii) an enforcement notice appeal;(iii) an enforcement proceeding; and
(b) for an enforcement notice appeal, also includes costs relating to investigations or gathering of evidence for the giving of the relevant enforcement notice.