Zimbabwe National Water Authority v (1) Hippo Valley Estates Limited (2) Triangle Limited

The appellant (Zimbabwe National Water Authority - ZINWA) is a statutory authority established under the Zimbabwe National Water Authority Act [Chapter 20:25] with a mandate to regulate and manage Zimbabwe's natural water reserves. The respondents are public companies in the sugar production industry. In the late 1950s and early 1960s, the appellant entered into water supply agreements with the respondents to provide raw water for irrigation of sugar cane. On 17 December 2015, following a national budget pronouncement, the appellant wrote to the respondents advising that water tariffs for Commercial Agriculture (Estates) had been increased from $9.45 per megalitre to $12.00 per megalitre, effective from 1 December 2015. The respondents objected to this increase. On 19 January 2016, the respondents noted an appeal to the Minister in terms of section 49 of the ZINWA Act. Subsequently, on 2 February 2016, the respondents filed an application for review in the High Court seeking to review the appellant's decision to increase tariffs. The High Court granted the application for review, finding that the appellant had acted unprocedurally and violated the agreements. The appellant appealed to the Supreme Court.

• Whether the respondents were required to exhaust domestic remedies (the appeal to the Minister under section 49 of the ZINWA Act) before approaching the High Court for review
• Whether the principle of lis alibi pendens applied to bar the review application while the appeal to the Minister was pending
• Whether the High Court erred in dismissing the appellant's point in limine
• Whether the High Court properly exercised its judicial discretion in determining the preliminary point
• Whether the appellant's decision to increase water tariffs was procedurally proper and complied with contractual obligations

The appeal was allowed with costs. The judgment of the High Court was set aside and substituted with an order upholding the point in limine and dismissing the application for review.

The binding legal principles established are: (1) A party aggrieved by an administrative decision must exhaust domestic remedies provided by statute (in this case, the appeal mechanism under section 49 of the ZINWA Act) before approaching the High Court for judicial review, unless special circumstances warranting departure from this rule are demonstrated. (2) The principle of lis alibi pendens applies where there is a pending appeal or proceeding involving the same parties, same cause of action, and same subject matter, even if one proceeding is before an administrative authority rather than a court, and a court has discretion to stay one action pending determination of the other. (3) A party cannot bypass statutory appeal procedures on the basis of speculation that the appeal will be unsuccessful, particularly where further avenues of appeal exist (such as to the Administrative Court). (4) A court exercises its discretion improperly when it relies on extraneous and irrelevant considerations, including subsequently promulgated statutory instruments that were not part of the original dispute and did not operate retrospectively at the time of judgment.

The Court made observations regarding the promulgation and subsequent amendment of Statutory Instrument 48/2016, noting that it was only corrected to operate retrospectively (from 1 December 2015) by SI 97/2016 on 26 August 2016, a week after the High Court's judgment. The Court also observed that the principle from Makintosh v The Chairman Environmental Management Committee of City of Harare & Anor SC 12/14 and Malimanjani v Central African Building Society 2007 (2) ZLR 77 (S) regarding appellate interference with discretionary decisions is well-established: an appeal court will only interfere where the lower court acted upon a wrong principle, allowed extraneous or irrelevant matters to guide it, mistook the facts, or failed to take into account relevant considerations. The Court noted but did not decide the merits of whether the appellant's decision violated the water supply agreements or was procedurally improper, as this became unnecessary given the finding on the preliminary point.

This case is significant in Zimbabwean administrative law (and instructive for South African law given similar legal principles) for: (1) Reinforcing the principle that domestic or internal remedies provided by statute must be exhausted before approaching the courts for review, unless special circumstances are demonstrated; (2) Confirming that the principle of lis alibi pendens can apply to quasi-judicial proceedings before administrative authorities, not just court proceedings; (3) Establishing that appeals to Ministers under statutory appeal provisions must be pursued and cannot be bypassed merely on speculation that they will be unsuccessful; (4) Demonstrating the limited circumstances in which an appellate court will interfere with a lower court's exercise of discretion, and that reliance on extraneous and irrelevant considerations (such as subsequently promulgated statutory instruments not part of the original dispute) constitutes an improper exercise of discretion; (5) Emphasizing the importance of finality in litigation and preventing parallel proceedings on the same matter.