The binding legal principles established are: (1) Locus standi is determined without reference to the merits or demerits of the claim and concerns whether a party has legal capacity to sue or be sued, or has sufficient interest (not abstract, hypothetical or academic) in the proceedings; (2) Where a party is of a class of persons that may in principle obtain the relief claimed but fails to plead a cause of action in law, this is not properly characterized as a lack of locus standi; (3) The upholding of an exception or special plea that a pleading does not disclose a cause of action disposes of the pleading, not the action or defence itself; (4) When a pleading is found defective for failing to disclose a cause of action, the court should ordinarily grant leave to amend as a matter of course, not as an indulgence, unless there is good reason that the pleading cannot be amended; (5) Fairness and justice require that a party be afforded the opportunity to amend defective pleadings.