TAN SENG KEE v ATTORNEY GENERAL

Case Details

• Citation: [2022] SGCA 16
• Court: Court of Appeal of the Republic of Singapore
• Decision Date: 28 February 2022
• Coram: Sundaresh Menon CJ, Andrew Phang Boon Leong JCA, Judith Prakash JCA, Tay Yong Kwang JCA, Steven Chong JCA
• Case Number: Civil Appeal No 54 of 2020; Civil Appeal No 55 of 2020; Civil Appeal No 71 of 2020
• Hearing Date(s): 25 January 2021
• Appellants: Tan Seng Kee (CA 54/2020); Ong Ming Johnson (CA 55/2020); Choong Chee Hong (CA 71/2020)
• Respondent: Attorney-General
• Counsel for Appellants: Ravi s/o Madasamy (Carson Law Chambers) for Tan Seng Kee; Eugene Singarajah Thuraisingam, Suang Wijaya, Johannes Hadi and Joel Wong En Jie (Eugene Thuraisingam LLP) for Ong Ming Johnson; Harpreet Singh Nehal SC, Jordan Tan, Victor Leong (Audent Chambers LLC) (instructed), Choo Zheng Xi, Priscilla Chia Wen Qi and Wong Thai Yong (Peter Low & Choo LLC) for Choong Chee Hong
• Counsel for Respondent: Kristy Tan Ruyan SC, Hui Choon Kuen, Wong Huiwen Denise, Jeremy Yeo and Pang Ru Xue Jamie (Attorney-General’s Chambers)
• Practice Areas: Constitutional Law; Statutory Interpretation; Administrative Law

Summary

The judgment in Tan Seng Kee v Attorney-General represents a watershed moment in Singapore’s constitutional jurisprudence, specifically regarding the intersection of criminal law, executive discretion, and fundamental liberties. The Court of Appeal was tasked with determining the constitutionality of s 377A of the Penal Code, a provision that criminalised acts of "gross indecency" between male persons. While the appellants sought a declaration that the provision was unconstitutional under Articles 9, 12, and 14 of the Constitution, the Court arrived at a unique and doctrinally significant conclusion: that s 377A is currently unenforceable in its entirety due to a binding "political compromise" and the doctrine of substantive legitimate expectations.

The Court of Appeal, presided over by a five-judge panel, navigated the complex history of s 377A, tracing its origins to the English Criminal Law Amendment Act 1885 and its subsequent introduction into the Singapore Penal Code in 1938. Central to the Court’s reasoning was the "political compromise" reached in Parliament in 2007. During that period, the Government decided to retain s 377A on the statute books to reflect the moral sentiments of the conservative majority, while simultaneously pledging not to proactively enforce it against consenting adults in private. This compromise was further solidified by representations made by the Attorney-General (AG) in 2018, which the Court found created a legally enforceable constraint on the exercise of prosecutorial power.

Doctrinally, the Court applied the "reasonable classification" test to the equality challenge under Article 12, ultimately finding that the provision did not violate the Constitution on that ground because it targeted specific conduct rather than a class of persons. However, the Court’s most significant contribution was the application of the doctrine of substantive legitimate expectations within the context of constitutional law. The Court held that the AG’s representations regarding non-enforcement were clear, unambiguous, and intended to be relied upon, thereby creating a situation where any attempt to prosecute conduct within the "Subset" (private, consensual acts between adult males) without prior notice would be an abuse of process.

The broader significance of this case lies in its articulation of the separation of powers. The Court of Appeal emphasized that while it has the power to review the constitutionality of legislation, it must also respect the role of Parliament in managing sensitive social issues through political compromise. By declaring the provision unenforceable rather than unconstitutional, the Court maintained the delicate balance between the legal validity of the law and the practical protection of the rights of the individuals affected by it. This decision effectively rendered s 377A a "dead letter" in practice, while leaving the ultimate question of its repeal to the legislative branch.

Timeline of Events

1. 6 August 1885: The English Criminal Law Amendment Act 1885 is enacted in the United Kingdom. Section 11 of this Act criminalises acts of gross indecency between male persons, serving as the precursor to Singapore’s s 377A.
2. 24 March 1938: The Penal Code (Amendment) Bill is introduced in the Straits Settlements, which includes the provision that would become s 377A.
3. 29 April 1938: The second reading of the Penal Code (Amendment) Bill takes place.
4. 18 May 1938: The Penal Code (Amendment) Bill is passed, officially introducing s 377A into the Singapore Penal Code.
5. 13 June 1938: The 1938 amendments to the Penal Code come into force.
6. 16 September 1963: Singapore joins the Federation of Malaysia; the Constitution of the State of Singapore is established.
7. 27 August 1966: The Constitution of the Republic of Singapore is formally adopted following independence.
8. 22 October 2007: A major debate begins in the Parliament of Singapore regarding the repeal of s 377A during the review of the Penal Code.
9. 23 October 2007: The Prime Minister and other members of Parliament articulate a "political compromise," deciding to retain s 377A but not proactively enforce it against consenting adults in private.
10. 2 October 2018: Following the Indian Supreme Court's decision in Navtej Singh Johar v Union of India, public debate in Singapore regarding s 377A is reignited.
11. 6 October 2018: The Attorney-General’s Chambers (AGC) issues statements clarifying the prosecutorial policy regarding s 377A, reinforcing the 2007 compromise.
12. 1 November 2018: Further representations are made by the Government and the AG regarding the non-enforcement of s 377A in private, consensual settings.
13. 2018–2019: The appellants (Tan Seng Kee, Ong Ming Johnson, and Choong Chee Hong) file separate Originating Summonses (OS 1176/2019, OS 1114/2018, and OS 1436/2018) challenging the constitutionality of s 377A.
14. 25 January 2021: The Court of Appeal hears the consolidated appeals (CA 54, 55, and 71 of 2020).
15. 28 February 2022: The Court of Appeal delivers its judgment, declaring s 377A unenforceable in its entirety unless and until the AG provides clear notice of a change in prosecutorial policy.

What Were the Facts of This Case?

The appeals in Tan Seng Kee v Attorney-General arose from three separate constitutional challenges to s 377A of the Penal Code (Cap 224, 2008 Rev Ed). The appellants—Tan Seng Kee, Ong Ming Johnson, and Choong Chee Hong—were individuals who argued that the continued existence of s 377A on the statute books infringed upon their fundamental rights as guaranteed by the Constitution of the Republic of Singapore. Specifically, they targeted the provision which stated: "Any male person who, in public or private, commits, or abets the commission of, or procures or attempts to procure the commission by any male person of, any act of gross indecency with another male person, shall be punished with imprisonment for a term which may extend to 2 years."

The factual matrix of the case was deeply rooted in the legislative history and the socio-political context of Singapore. Section 377A was not an indigenous creation but was derived from s 11 of the English Criminal Law Amendment Act 1885. It was introduced into Singapore in 1938 to fill a perceived gap in the law, as the existing s 377 (which criminalised "unnatural offences" or buggery) only covered anal penetration. Section 377A was intended to criminalise other forms of sexual activity between men, such as oral sex and mutual masturbation, which were referred to as "gross indecency."

The modern controversy surrounding s 377A reached a peak in 2007 during a comprehensive review of the Penal Code. At that time, Parliament faced intense lobbying from both proponents of repeal and those who wished to retain the law. The Government’s response was the "political compromise": s 377A would remain in the Penal Code as a symbolic marker of the values of the conservative majority, but the State would not proactively enforce it against consenting adults in private. This policy was articulated by the Prime Minister and the Minister for Home Affairs, who stated that the police would not go looking for people to prosecute under this section, and that the law would essentially be a "dead letter" for the "Subset" of conduct involving private, consensual acts between adult males.

In 2018, the issue returned to the public eye following the decriminalisation of similar conduct in India. In response to renewed calls for repeal, the Attorney-General, Lucien Wong SC, made several public representations. He clarified that the prosecutorial policy remained consistent with the 2007 compromise. Specifically, he stated that where the conduct involved consenting adults in private, the public interest would generally not require a prosecution. These representations were central to the appellants' arguments, as they contended that the law was either "absurd" because it was not enforced, or that the lack of enforcement proved it served no legitimate state purpose.

The three appellants brought their challenges through different legal lenses. Tan Seng Kee’s challenge was broad, focusing on the historical and social impact of the law. Ong Ming Johnson’s challenge emphasized the scientific evidence regarding the immutability of sexual orientation, arguing that criminalising conduct tied to an unchangeable trait was inherently discriminatory. Choong Chee Hong’s challenge focused heavily on the "reasonable classification" test under Article 12, arguing that s 377A created an arbitrary distinction between men and women, as women were not subject to similar criminalisation for "gross indecency."

The procedural history involved a High Court decision in [2020] SGHC 63, where the Judge dismissed the challenges, finding that s 377A was constitutional and that the 2007 political compromise did not render the law invalid. The Judge had applied the Tan Cheng Bock framework for statutory interpretation and concluded that the legislative purpose of s 377A was to safeguard public morality. The appellants subsequently appealed to the Court of Appeal, leading to the present judgment. The Court of Appeal had to reconcile the strict legal text of the statute with the reality of its non-enforcement and the constitutional protections of liberty, equality, and expression.

What Were the Key Legal Issues?

The Court of Appeal identified several critical legal issues that required resolution to determine the fate of s 377A. These issues spanned statutory interpretation, constitutional law, and administrative law.

• The Interpretation of s 377A: The first issue was the proper interpretation of s 377A using the framework set out in Tan Cheng Bock v Attorney-General [2017] 2 SLR 850. This involved determining the legislative purpose of the provision at the time of its enactment in 1938 and whether that purpose remained relevant or had been superseded by subsequent events.
• Consistency with Article 12 (Equal Protection): The appellants argued that s 377A violated the "reasonable classification" test. The Court had to determine:
  • Whether the law created an "intelligible differentia" that distinguished those who were within the group from those who were outside (i.e., men vs. women).
  • Whether that differentia had a "rational relation" to the purpose of the statute.
• Consistency with Article 9 (Right to Life and Personal Liberty): The issue was whether the term "personal liberty" in Article 9(1) included a right to privacy or a right to engage in consensual sexual activity, and whether s 377A deprived the appellants of this liberty in a manner not "in accordance with law."
• Consistency with Article 14 (Freedom of Speech and Expression): The Court considered whether s 377A unconstitutionally restricted the right of male persons to express their sexual identity through physical acts.
• The Doctrine of Substantive Legitimate Expectations: A pivotal issue was whether the representations made by the Government in 2007 and the AG in 2018 created a substantive legitimate expectation that s 377A would not be enforced against the "Subset." If so, the Court had to decide the legal effect of this expectation on the enforceability of the statute.
• The Role of the Judiciary in "Political Compromises": The Court had to address the institutional question of how the judiciary should treat a law that the legislature has intentionally kept on the books as a symbolic measure while the executive has pledged not to enforce it.

How Did the Court Analyse the Issues?

The Court of Appeal’s analysis was exhaustive, covering nearly 200 pages and addressing each constitutional and doctrinal point with precision. The judgment, delivered by Sundaresh Menon CJ, began by framing the dispute not as a moral debate, but as a purely legal inquiry into constitutional consistency.

Statutory Interpretation and the Tan Cheng Bock Framework

The Court applied the three-step framework from Tan Cheng Bock to interpret s 377A. First, it sought the ordinary meaning of the text. Second, it examined the legislative purpose. Third, it compared the two. The Court noted that s 377A was based on s 11 of the 1885 UK Act. The Judge below had found that the purpose was to protect public morality. However, the Court of Appeal delved deeper into the 1938 context, noting that the provision was introduced to criminalise acts that did not amount to "sodomy" under the existing s 377. The Court observed that while the text was broad, the 2007 "political compromise" had fundamentally altered the "legal sense" of the provision in the modern context.

Article 12 and the Reasonable Classification Test

The Court applied the "reasonable classification" test as distilled in Public Prosecutor v Taw Cheng Kong [1998] 2 SLR(R) 489.

"Under this test, a statutory provision is consistent with Art 12(1) if: (a) the classification is founded on an intelligible differentia; and (b) that differentia has a rational relation to the purpose of the statute." (at [305])

The Court found that s 377A satisfied the first limb because it clearly distinguished between male persons (who could commit the offence) and female persons (who could not). Regarding the second limb, the Court held that the differentia was rationally related to the purpose of criminalising male-to-male "gross indecency." The Court rejected the argument that the law was under-inclusive (by not targeting women) or over-inclusive. It emphasized that the "rational relation" test does not require the law to be perfect or to solve all aspects of a problem, only that the classification is not arbitrary in relation to the specific purpose Parliament sought to achieve.

Article 9 and the Scope of "Personal Liberty"

The appellants argued for a broad reading of "personal liberty" to include a right to privacy, citing the US Supreme Court decisions in Lawrence v Texas and Roe v Wade. The Court of Appeal maintained its long-standing position that "personal liberty" in Article 9(1) refers primarily to freedom from unlawful physical restraint. It declined to follow the "living constitution" doctrine or to expand the right to include sexual autonomy. The Court noted that such an expansion would involve the judiciary in making social policy decisions that are better left to Parliament. It cited Yong Vui Kong v Public Prosecutor [2015] 2 SLR 1129 to reinforce that the right to life and liberty is not an open-ended guarantee of all possible human rights.

The Doctrine of Substantive Legitimate Expectations

This was the most innovative part of the judgment. The Court examined whether the AG’s 2018 representations created a binding constraint. It referred to SGB Starkstrom Pte Ltd v Commissioner for Labour [2016] 3 SLR 598 and Chiu Teng @ Kallang Pte Ltd v Singapore Land Authority [2014] 1 SLR 1047. The Court found that the AG had made a "clear and unambiguous representation" that the "Subset" of conduct would not be prosecuted.

"The doctrine of substantive legitimate expectations... is rooted in the principle of fairness and the rule of law." (at [120])

The Court concluded that the AG’s representations were not merely statements of current policy but were intended to provide assurance to the public. Consequently, the Court held that s 377A is "unenforceable in its entirety" against the Subset. This unenforceability is not a finding of unconstitutionality, but a recognition that the Executive has, through its own representations, limited its power to prosecute. The Court held that any prosecution brought in violation of this expectation would be an abuse of process and would be stayed by the courts.

The "Political Compromise" as a Legal Reality

The Court analyzed the 2007 Parliamentary debate as a unique constitutional event. It noted that the Legislature had made a deliberate choice to keep a law that it did not intend to enforce proactively. This "political compromise" was seen as a way to manage deep societal divisions. The Court held that it must respect this compromise. However, the Court also noted that the compromise had a legal consequence: it removed the "threat" of prosecution that would otherwise give the appellants standing to challenge the law’s constitutionality in a vacuum. Because the law was not being enforced, the "deprivation of liberty" was theoretical rather than actual.

What Was the Outcome?

The Court of Appeal delivered a nuanced outcome that did not grant the appellants the declaration of unconstitutionality they sought, but provided them with a significant legal shield. The Court dismissed the appeals in terms of the constitutional challenges under Articles 9, 12, and 14, but issued a landmark ruling on the enforceability of the provision.

The operative holding of the Court was as follows:

"s 377A is unenforceable in its entirety, unless and until the AG of the day provides clear notice that he, in his capacity as the PP: (a) intends to reassert his right to enforce s 377A proactively by way of prosecution; and (b) will no longer abide by the representations made by AG Wong in 2018 as to the prosecutorial policy that applies to conduct falling within the Subset." (at [330])

The Court’s orders can be summarized as follows:

• Declaratory Relief: The Court declared that s 377A is currently unenforceable. This means that as long as the current prosecutorial policy remains in place, no person can be prosecuted for consensual sexual acts between adult males in private.
• Constitutional Validity: The Court upheld the legal validity of s 377A, finding that it did not violate Articles 9, 12, or 14 of the Constitution based on the tests applied.
• Prosecutorial Constraint: The Court held that the Attorney-General is legally bound by the representations made in 2018. Any attempt to prosecute the "Subset" without prior, clear notice of a change in policy would constitute an abuse of process.

Costs: Regarding the costs of the proceedings, the Court took a balanced approach.

"we make no order as to costs for the proceedings both before us and in the court below." (at [331])

This reflected the public interest nature of the litigation and the fact that while the appellants did not succeed in striking down the law, they achieved a significant clarification of their legal position.

The practical effect of the judgment was to freeze s 377A in a state of legal suspended animation. It remained on the statute books, satisfying the "symbolic" requirement of the 2007 political compromise, but it was stripped of its coercive power against the specific group of people it most directly affected. The Court effectively placed the ball back in the court of the Executive and the Legislature, stating that if they wished to resume prosecutions, they would have to do so transparently and with advance notice, which would then likely trigger a fresh and more immediate constitutional challenge.

Why Does This Case Matter?

Tan Seng Kee v Attorney-General is a landmark for several reasons, ranging from the specific fate of s 377A to the broader development of Singapore’s administrative and constitutional law. For practitioners, the case is a masterclass in how the Court of Appeal balances judicial review with the doctrine of the separation of powers.

First, the case introduces the doctrine of substantive legitimate expectations into the realm of criminal prosecution and constitutional law. While previously discussed in the context of administrative decisions (like land use in Chiu Teng or labour compensation in Starkstrom), its application here to a criminal statute is unprecedented. It establishes that the Attorney-General’s public representations regarding prosecutorial policy can create a binding legal obligation that the courts will enforce. This significantly narrows the "absolute" nature of prosecutorial discretion under Article 35(8) of the Constitution, suggesting that such discretion must be exercised consistently with prior representations to avoid being an abuse of process.

Second, the judgment provides a definitive application of the "reasonable classification" test under Article 12. By upholding s 377A against the equality challenge, the Court reaffirmed a relatively high threshold for striking down legislation on the basis of discrimination. The Court’s refusal to find the law "absurd" or "arbitrary" despite its non-enforcement underscores a judicial preference for legislative intent over practical outcomes when determining the constitutionality of a statute’s classification.

Third, the case clarifies the scope of Article 9. The Court’s rejection of a US-style "right to privacy" or "sexual autonomy" within the meaning of "personal liberty" reinforces the "originalist" or "textualist" approach of the Singapore courts. This provides clear guidance for future constitutional challenges: rights not explicitly mentioned in the text or firmly rooted in the historical understanding of the provision are unlikely to be read into the Constitution by the judiciary.

Fourth, the judgment is a profound statement on the separation of powers. The Court’s recognition of the "political compromise" as a valid method for the Legislature to handle sensitive social issues shows a high degree of judicial deference to Parliament. However, by declaring the law unenforceable, the Court also asserted its role as the guardian of the rule of law, ensuring that the Executive cannot "have it both ways"—maintaining a law for symbolic reasons while promising not to enforce it, without that promise having legal weight.

Finally, the case had an immediate and massive impact on the LGBTQ+ community in Singapore. While it did not repeal s 377A, it provided the strongest possible legal assurance that the law would not be used against them. This "unenforceability" status served as a bridge between the 2007 compromise and the eventual legislative resolution of the issue. For practitioners, the case serves as a reminder that constitutional litigation can result in creative remedies that go beyond a simple "valid" or "invalid" binary.

Practice Pointers

• Substantive Legitimate Expectations: When dealing with executive representations, practitioners should look for "clear and unambiguous" statements. This case proves that such statements can be used to stay prosecutions or challenge administrative actions even when the underlying statute remains valid.
• Constitutional Standing: The Court’s analysis of "standing" is crucial. If a law is not being enforced, a claimant may struggle to show a "violation of rights" sufficient to trigger a constitutional strike-down. Practitioners must demonstrate a real, rather than theoretical, threat of enforcement.
• Reasonable Classification Test: When challenging a law under Article 12, focus on the "rational relation" limb. It is not enough to show that a law is unfair or targets a specific group; one must show that the classification has no logical connection to the object of the statute.
• Use of Foreign Jurisprudence: The Court’s treatment of Lawrence v Texas and Navtej Singh Johar shows that while foreign cases are persuasive, the Singapore Court of Appeal will prioritize the specific historical and text-based context of the Singapore Constitution. Do not rely solely on foreign "living constitution" arguments.
• Statutory Interpretation: Always apply the Tan Cheng Bock framework. The legislative purpose at the time of enactment is the primary driver of interpretation, but subsequent "political compromises" can affect the modern "legal sense" of the provision.
• Abuse of Process: This case highlights that the court’s inherent power to prevent an abuse of process is a powerful tool. If the State acts inconsistently with its own stated policies, an "abuse of process" argument may succeed where a direct constitutional challenge fails.
• Evidence of Immutability: While the Court acknowledged the arguments regarding the immutability of sexual orientation, it held that such scientific debates are for Parliament, not the courts. Practitioners should be cautious about using expert scientific evidence to override clear legislative choices.

Subsequent Treatment

The ratio of Tan Seng Kee v Attorney-General regarding the unenforceability of s 377A based on substantive legitimate expectations remains a landmark in Singapore administrative and constitutional law. While the provision was eventually addressed through the legislative process, the Court’s holding on the binding nature of the Attorney-General’s representations continues to be cited in discussions regarding the limits of prosecutorial discretion and the protection of legitimate expectations. The case is frequently referenced in subsequent constitutional challenges as the definitive authority on the "reasonable classification" test and the scope of Article 9 "personal liberty."

Legislation Referenced

• Penal Code (Cap 224, 2008 Rev Ed), s 377A
• Penal Code (Cap 20, 1936 Rev Ed), s 377
• Interpretation Act (Cap 1, 2002 Rev Ed), s 9A(1), s 9A(2)(a)
• Prevention of Corruption Act (Cap 241, 1993 Rev Ed), s 37(1)
• Work Injury Compensation Act (Cap 354, 2009 Rev Ed)
• English Criminal Law Amendment Act 1885, s 11
• Offences Against the Person Act 1861 (UK), s 61
• Buggery Act 1533 (UK)
• Sexual Offences Act 1956 (UK), s 13

Cases Cited

• Applied/Followed:
  • Ong Ming Johnson v Attorney-General and other matters [2020] SGHC 63
  • Public Prosecutor v Taw Cheng Kong [1998] 2 SLR(R) 489
  • Tan Cheng Bock v Attorney-General [2017] 2 SLR 850
  • SGB Starkstrom Pte Ltd v Commissioner for Labour [2016] 3 SLR 598
  • Chiu Teng @ Kallang Pte Ltd v Singapore Land Authority [2014] 1 SLR 1047
• Considered/Referred to:
  • Tan Hon Leong Eddie v Attorney-General [2021] SGHC 196
  • Mohammad Faizal bin Sabtu v Public Prosecutor [2012] 4 SLR 947
  • Lim Meng Suang and another v Attorney-General [2015] 1 SLR 26
  • Yong Vui Kong v Public Prosecutor [2010] 3 SLR 489
  • Ramalingam Ravinthran v Attorney-General [2012] 2 SLR 49
  • Nagaenthran a/l K Dharmalingam v Public Prosecutor [2019] 2 SLR 216
  • Lawrence et al v Texas 539 US 558 (2003)
  • Roe v Wade 410 US 113 (1973)
  • Attorney-General v Prince Ernest Augustus of Hanover [1957] AC 436
  • Minister for Immigration and Border Protection v WZARH (2015) 326 ALR 1

Source Documents

• Original Judgment at eLitigation
• Full Judgment PDF (CDN)