The Court recalled that Article 2(4) of the Constitution provides that any law, which is inconsistent with the Constitution, is invalid to the extent of the inconsistency. The Court affirmed its jurisdiction to hear matters relating to constitutionality of laws pursuant to Article 165(3) of the Constitution.
The Court recognized that both criminal law and human rights law uphold the principle of legality which is that nothing is a crime unless it is clearly forbidden in law. This principle is reflected in Article 50(2)(n) of the Constitution, and also defined under Article 11 of the Universal Declaration of Human Rights (UDHR). In this sense, the Court explained that general rules of international law have been imported into the law of Kenya in accordance with Article 2(5) of the Constitution, which binds state and nonstate organs and persons through the operation of Article 10 of the Constitution.
The Court referred to various precedents to clarify the principle of legality and its applicability, including the Kenyan case of Keroche Industries Limited v. Kenya Revenue Authority & 5 Others (2007), and Kokkinakis v. Greece case (1992), where the European Court on Human Rights established: “…only the law can define a crime and prescribe a penalty… it follows from this that an offence must be clearly defined in law. This condition is satisfied where the individual can know from the wording of the relevant provision and, if need be, with the assistance of the courts’ interpretation of it, what acts and omissions will make him liable.”
In order to attain legal certainty, the rules should be ascertainable by access to public sources. In this sense, the Court stated that “the acceptance of the rule of law as a constitutional principle requires that a citizen, before committing himself to any course of action, should be able to know in advance what are the legal consequences that will flow from it.” (See Lord Diplock in BlackClawson International Ltd v. Papierwerke Waldhof-Aschaffenberg AG (1975))
Applying the principle of legality to Section 24 of the Act, the Court agreed with the Petitioner that the provision is vague, overbroad, and lacked certainty, especially with regard to the use of the term “sexual contact”, which the Court agreed could include mother to child transmission through pregnancy, delivery, and breastfeeding. The Court held that Section 24 of the Act failed to define the offence in law, meaning that it was not clearly discernible to citizens what acts and omissions will make them liable. The Court therefore held that Section 24 was unconstitutional.
On the other hand, the Court considered the obligation to disclose a PLWH’s seropositive status to “sexual contacts” and the lack of a duty to keep such disclosure confidential in light of the right to privacy recognized in Article 31 of the Constitution. The Court examined the conditions set out in Article 24 of the Constitution that need to be met to justify limitation of any fundamental right under the Constitution. The Court considered international human rights treaties and universally accepted principles of democracy, and precedents where courts with similar legal systems have applied such principles in determining what constitutes a reasonable and justifiable limitation of rights in an open and democratic society (See Ugandan decision of Obbo and Another v. Attorney General (2004)).
Consequently, the Court held that Section 24 of the Act violates the right to privacy protected under Article 31 of the Constitution, as it does not guarantee confidentiality of information disclosed by or on behalf of PLWH. Further, the Court explained that Section 24 of the Act did not satisfy the provisions of Section 24 of the Constitution which permits law to limit fundamental rights to the extent that such limitations are reasonable and justifiable in an open and democratic society based on human dignity, equality, and freedom.
Finally, the Court refrained from making any determination on the challenge to the Act as a whole, because the petition was specifically directed to Section 24 of the Act. However, it noted that there were problems with the drafting of the Act and recommended that the relevant authority review the provisions of the Act to avoid further litigation.