Aggrieved person: invasion of a legal right or direct adverse effect on pecuniary interest enabling a challenge. The term aggrieved person denotes one who has suffered legal injury, loss or injustice; legal dictionaries define such a person as someone whose legal right is invaded or whose pecuniary interest is directly and adversely affected by an act, decree or judgment. The concept requires a concrete and substantial grievance-such as divestment or imposition of a burden-that establishes entitlement to challenge or seek remedy.