Constitutional Review: Senate and Finality in Kenya
When the Supreme Court of Kenya has made a decision, an unsuccessful party cannot normally ask the same Court to hear the case again simply because the result appears wrong. Senate of Kenya v Speaker of the National Assembly, decided in January 2023, is a practical authority on that boundary. It explains the difference between a narrow review jurisdiction designed to correct exceptional defects and a disguised second appeal.
The case is sometimes associated with the constitutional conflict
between the Senate and National Assembly over Bills concerning counties. That
background is important, but it can obscure the actual holding. The 2023 ruling
did not finally decide the merits of bicameral legislative power. It decided
whether the Supreme Court could reopen a stay ruling that had already itself
been made on review.
How the
review problem arose
The Senate and its leadership were involved in a larger
constitutional dispute alleging that the National Assembly had processed and
enacted Bills without the concurrence required where a Bill concerns county
government. During the appellate proceedings, the Supreme Court granted stay
orders on 19 May 2022.
On 3 June 2022 the Court reviewed and set those stay orders aside.
The Senate parties then filed another application asking the Court to review,
vary or set aside the 3 June ruling. They argued that the absence of a stay
exposed the bicameral process to continuing constitutional harm and could
undermine the main appeal.
In Senate of Kenya & 3 others v Speaker of the National Assembly
& 10 others [2023] KESC 1 (KLR), the Supreme Court dismissed the
application. The seriousness of the underlying constitutional dispute did not
give the Court a free-standing power to review its own review decision again.
Finality is
the starting point
The Supreme Court is the apex domestic court. There is no higher
Kenyan court to which an ordinary appeal from its decision may be taken. That
position makes finality particularly important. If every alleged error could be
repackaged as review, litigation in the country's highest court would never
conclusively end.
The Court therefore reaffirmed that it cannot sit on appeal over its
own decisions. Review is exceptional. It exists to deal with legally recognised
defects of a kind serious enough to justify disturbing finality, not to provide
another opportunity to argue that the Court misunderstood the law or gave
inadequate weight to a submission.
Rule 28(5) of the Supreme Court Rules reinforces that discipline by
treating a review determination as final and not itself subject to further
review. The doctrine of functus officio serves the same purpose once the Court
has conclusively performed its adjudicative task.
Section 21A
now states the review grounds
The Supreme Court Act gives the modern statutory formulation.
Section 21A provides that the Supreme Court may review its own decision where
the judgment, ruling or order was obtained through fraud, deceit or
misrepresentation of facts; where it is a nullity because it was made by a
court that was not competent; where the Court was misled into deciding under
the belief that the parties had consented; or where the decision was based on
repealed law or resulted from deliberate concealment of a statutory provision.
These categories are deliberately narrow. They are not equivalent to
ordinary grounds of appeal. A complaint that the Court reached the wrong
interpretation, overlooked an argument or should have drawn a different
inference will not ordinarily fit section 21A.
Recent Supreme Court practice continues to apply that restrictive
approach. In Sonko v Clerk, County Assembly of Nairobi City [2024] KESC 43
(KLR), the Court again described the section 21A grounds as the parameters for
review. In Julius v Chief Registrar of the Judiciary [2025] KESC 7 (KLR), the
Court also emphasised that a review application must be properly anchored in
the existing proceedings and within the statutory gateway.
The 2025
merits judgment must be kept separate
The larger bicameral controversy eventually reached a substantive
Supreme Court judgment on 21 March 2025 in Senate & 3 others v Speaker of
the National Assembly & 10 others [2025] KESC 11 (KLR). That judgment
decided questions about Article 110(3), Bills concerning counties, money Bills,
notification between the Speakers and the constitutionality of particular
statutes.
Among other things, the Supreme Court held that the joint
concurrence process under Article 110(3) is triggered where a question arises
whether a Bill concerns counties. It also held that the Speaker of the National
Assembly must notify the Speaker of the Senate of the classification taken on a
Bill, and it invalidated particular enactments that required Senate
involvement.
Those propositions come from the 2025 merits judgment, not from the
2023 review ruling. A legally accurate case note should therefore resist
merging the two decisions simply because they arose from the same institutional
conflict.
The later
2025 review reinforces the lesson
After the March 2025 merits judgment, another application sought
review. On 15 August 2025, the Supreme Court dismissed that application in
Senate & 3 others v Speaker of the National Assembly & 10 others [2025]
KESC 49 (KLR).
That later ruling again applied section 21A and the Court's
established finality jurisprudence. Its importance for the 2023 case is
confirmatory. Even where the dispute involves Parliament, devolution and
nationally significant constitutional interpretation, public importance does
not replace a statutory ground of review.
This gives practitioners a clear distinction. The route for
challenging an ordinary legal error is an appeal where the constitutional
structure permits one. Review at the Supreme Court is a safety valve for
exceptional defects within section 21A, not a further appellate tier after the
apex court has already spoken.
How a
review application should be assessed
Before filing, counsel should identify the exact judgment, ruling or
order to be reviewed and the specific section 21A ground relied upon. The
affidavit should then prove facts that fit that ground.
If fraud or misrepresentation is alleged, the application should
identify the false material and explain how it affected the decision. If
nullity is alleged, the jurisdictional incompetence must be demonstrated. If
consent was mistakenly assumed, the record should show the mistake. If the
complaint concerns repealed law or concealed legislation, the relevant
statutory material should be identified precisely.
An application that merely repeats earlier submissions is likely to
look like a disguised appeal. The same is true of a request that says the Court
should reconsider because the consequences of the decision are serious.
Consequence may explain urgency, but it does not create jurisdiction.
Why the
case matters beyond Parliament
The 2023 Senate ruling matters to every litigant before the Supreme
Court because it protects the difference between correction and endless
reconsideration. A court system needs mechanisms for exceptional injustice, but
it also needs a point at which litigation is over.
For constitutional institutions, the case carries an additional
lesson. Even a genuine dispute about the distribution of constitutional power
must move through the jurisdictional path the Constitution and statute provide.
The importance of the subject cannot enlarge the Court's authority.
The cleanest way to cite the litigation is therefore to separate its
stages. The 2023 decision is authority on review finality. The March 2025
judgment is authority on the substantive bicameral questions it decided. The
August 2025 ruling reinforces the narrow review jurisdiction after the merits.
Keeping those stages separate makes the precedent more useful and prevents one
ruling from being asked to prove something it never decided.
Source note
This article is based on Senate of Kenya & 3 others v Speaker of the National Assembly & 10 others [2023] KESC 1 (KLR), section 21A of the Supreme Court Act, rule 28(5) of the Supreme Court Rules 2020, Fredrick Otieno Outa v Jared Odoyo Okello & 3 others, Senate & 3 others v Speaker of the National Assembly & 10 others [2025] KESC 11 (KLR), Senate & 3 others v Speaker of the National Assembly & 10 others [2025] KESC 49 (KLR), Sonko v Clerk, County Assembly of Nairobi City [2024] KESC 43 (KLR), and Julius v Chief Registrar of the Judiciary [2025] KESC 7 (KLR).
Suggested citation:
Ronald Serwanga, "Constitutional Review: Senate
and Finality in Kenya" East Africa Legal Insight (9 September 2026).