The doctrine of separation of powers is a fundamental tenet of constitutional governance, designed to prevent the concentration of authority by dividing government functions among three distinct branches: the executive, legislature, and the judiciary. Montesquieu articulated this principle in The Spirit of Laws (1748) where he argued that liberty cannot exist when judicial power remains joined with legislative and executive authority. In Malaysia, this principle is adapted through the Westminster parliamentary system, which creates a modified separation rather than a strict division. Because Cabinet ministers must be sitting members of Parliament, executive dominance over the legislature is entrenched, making the judiciary the only branch capable of checking constitutional excess (Federal Constitution, Article 4(1)).
This dominance is further entrenched through ouster clauses in statutes such as the Prevention of Crime Act 1959 (POCA) and Security Offences (Special Measures) Act 2012 (SOSMA), which attempts to shield executive actions from judicial review, raising serious constitutional concerns. Moreover, the executive has historically abused its amendment powers under art 159, using its two‑thirds majority in Parliament to alter the Constitution for political ends, most notoriously in 1988, when it amended art 121(1) to strip the courts of their inherent judicial power.
Within this framework, the judiciary plays a particularly vital role. It is entrusted with interpreting the Constitution, resolving disputes, and protecting fundamental liberties against encroachment by the executive or legislature. Courts function as guardians of constitutional supremacy, ensuring that laws and governmental actions remain consistent with the nation’s highest legal document. Harding emphasized that judicial review in Malaysia is central to maintaining the rule of law, while Shad Saleem Faruqi highlighted that judicial independence is indispensable for democratic accountability. Public confidence in the legal system depends on the judiciary’s ability to act not merely as a neutral arbiter of disputes but as a central institution that upholds constitutional democracy.
However, the development of the independence of the judiciary has not been entirely consistent, and this inconsistency itself remains a contentious issue in Malaysian constitutional law. The 1988 amendment to art 121(1) removed the reference to the “judicial power of the Federation” subordinating the judiciary to Parliament and exposing its vulnerability to executive interference. This crisis was compounded by the removal of Lord President Tun Salleh Abas and the suspension of senior judges, events that symbolized the erosion of judicial independence.
Nonetheless, the judiciary began reclaiming its role through the revival of the Basic Structure Doctrine. In *Sivarasa Rasiah v Badan Peguam Malaysia & Anor* [2010] MLJ 333, the Federal Court recognized that fundamental constitutional principles cannot be undermined by legislative action. This revival was further strengthened in later cases such as *Semenyih Jaya Sdn Bhd v Pentadbir Tanah Daerah Hulu Langat* [2017] 3 MLJ 561 and *Indira Gandhi a/p Mutho v Pengarah Jabatan Agama Islam Perak* [2018] 1 MLJ 545, where the courts reaffirmed judicial independence and constitutional supremacy. The evolution of this doctrine demonstrates the judiciary’s resilience, insisting on the core values of separation of powers and the rule of law despite past setbacks. Yet, the extent to which the Basic Structure Doctrine can shield the judiciary from executive dominance remains a live debate, reflecting the ongoing tension between constitutional ideas and political realities in Malaysia.
This essay argues that Malaysia’s separation of powers is marked by a persistent debate between executive dominance and judicial independence. While the 1988 constitutional crisis and the amendment to art 121(1) exposed the judiciary’s fragility under political pressure, the revival of the Basic Structure Doctrine in cases such as *Sivarasa Rasiah* (2010), *Semenyih Jaya* (2017), and *Indira Gandhi* (2018) demonstrates its resilience in reclaiming constitutional supremacy. The judiciary’s trajectory highlights the contentious struggle between ouster clauses, constitutional amendments, and the courts’ role as guardians of the rule of law.
Part 1: Classical Era of Defence
The Malaysian constitution, heavily influenced by the Westminster model, does not enforce a strict separation of powers but rather a fusion between the executive and legislative branches. This overlap between the Executive and Legislature is not an accidental feature, instead it is a unique feature of the Parliamentary Democracy System that is explicitly codified within the Federal Constitution, art 43. Federal Constitution, art 43(1) provides that the Yang di-Pertuan Agong shall appoint a Jemaah Menteri (Cabinet of Ministers) to advise him in the exercise of his functions. According to Federal Constitution art 43(2), the Prime Minister and Cabinet ministers are appointed from among members of either House of Parliament or Senate.
The constitutional requirements for ministers to be sitting members of the Parliament reinforces the fusion of powers. Unlike the presidential system, where the executive is distinct from the legislature, in Malaysia’s Parliamentary system, key figures of the executive branch are simultaneously members of the legislative branch. This reflects Walter Bagehot’s description of the Westminster Cabinet as “a combining committee—a hyphen which joins, a buckle which fastens, the legislative part of the state to the executive part of the state.” This metaphor illustrates that this fusion ensures that those who exercise executive authority remain directly accountable to Parliament. This is further demonstrated in Federal Constitution, art 43(2)(a) provides that the Yang di-Pertuan Agong shall first appoint as Perdana Menteri (Prime Minister) to preside over the Cabinet a member of the House of Representatives who in his judgment is likely to command the confidence of the majority of the members of that House. Thus, Malaysia operates under a system of executive and legislative fusion rather than a strict institutional separation between them.
However, the same constitutional overlap can cause executive dominance when the government commands a strong Parliamentary majority. In practice, the Prime Minister is usually the leader of the political party or coalition that commands a majority of seats in the Dewan Rakyat. This structural fusion becomes practically significant when the ruling party or coalition secures a commanding majority in the Dewan Rakyat. Historically, the Barisan Nasional coalition maintained uninterrupted two-thirds majorities from independence until 2008, with brief interruptions. According to the Federal Constitution, art 159(3) a Bill to amend most constitutional provisions requires support from at least two-thirds of the total number of members of that House. With such a majority, the executive branch effectively controls the ordinary legislation and also the power to reshape the Constitution itself.
The dominance of the executive over the legislatures operates through multiple interconnected mechanisms. First, the Malaysian parliamentary system is practiced through the mechanism of party discipline. Government Members of Parliament are expected to vote in favour of government bills and motions, a practice enforced by party whips. This ensures parliamentary support for much of its legislative agenda, limiting Parliament’s capacity to scrutinise and challenge executive decisions effectively. Consequently, the legislature’s role in checking the executive is diminished, leading to what Shad Saleem Faruqi terms a system of ‘executive paramountcy’ rather than parliamentary supremacy.
Before 1988, the judiciary authority was explicitly grounded in the original wording of the Federal Constitution, art 121(1) which vested the “judicial power of Federation” in the two High Courts and subordinate courts. At this stage, Malaysian judges generally took a cautious approach towards Parliament and the executive. This reflected the influence of British parliamentary traditions, where courts avoided questioning the validity of legislation as long as proper procedures were followed. In practice, the judiciary prioritised legislative supremacy and rarely challenged government actions.
This judicial deference was clearly illustrated in the Federal Court case of *Loh Kooi Koon v Government of Malaysia* [1977] 2 MLJ 187. In this case, the appellant challenged a constitutional amendment that had a retrospective effect on his right to be produced before a magistrate. The court was invited to adopt the Indian Basic Structure Doctrine, which holds that there are certain fundamental features of the constitution that Parliament cannot amend. The Federal Court refused to do so. Raja Azlan Shah FCJ, delivering the judgment, stated that while the constitution was the supreme law, Parliament had the power to amend it in any way it saw fit, provided the procedural requirements of Article 159 were met. The court distinguished the Malaysian Constitution from the Indian Constitution, concluding that there were no implied limitations on Parliament’s power to amend. This decision cemented the idea that the substance of a constitutional amendment was not a matter for the courts to question, effectively giving the legislature, controlled by the executive, enormous power over the constitutional framework itself.
The deferential stance seen in *Loh Kooi Koon* was not an isolated incident. It was characteristic of the judiciary’s approach to its constitutional role during this period. In cases involving fundamental liberties, particularly those concerning preventive detention under the Internal Security Act 1960 (ISA), the courts frequently deferred to the executive’s assessment of national security. For example, in *Karam Singh v Menteri Hal Ehwal Dalam Negeri, Malaysia* [1969] 2 MLJ 129, the Federal Court ruled that the executive’s subjective satisfaction was sufficient for detaining a person under the ISA. The court adopted a literal interpretation of the constitution and the relevant statute, choosing not to inquire into the substantive grounds of the detention. This approach prioritised public order and national security as defined by the executive over the individual’s fundamental liberty.
This trend of judicial non-interference in executive decisions relating to security matters continued up to the eve of the 1988 crisis. In *Theresa Lim Chin Chin & Ors v Inspector General of Police* [1988] 1 MLJ 293, the Supreme Court confirmed that the executive’s decision to detain a person under the ISA was not justiciable. The court held that the power to issue a detention order was a matter for the executive and the executive alone, thereby reinforcing the separation of powers in a way that shielded executive action from judicial scrutiny. Such decisions reflected a judicial philosophy deeply influenced by the British Diceyan concept of parliamentary supremacy, where courts traditionally avoid challenging the will of the legislature. Even though Malaysia has a supreme written constitution, the judiciary in this “classical era” often behaved as though Parliament, and by extension the executive that controlled it, was the ultimate authority. This judicial restraint, therefore, created a constitutional imbalance where the judiciary’s role as a check and balance was significantly limited, leaving the constitution vulnerable to an executive armed with a two-thirds parliamentary majority.
References
- Bagehot, W. (1867) The English Constitution. Chapman and Hall.
- Faruqi, S. S. (2008) Document of Destiny: The Constitution of the Federation of Malaysia. Star Publications.
- Federal Constitution of Malaysia.
- Harding, A. (2012) The Constitution of Malaysia: A Contextual Analysis. Hart Publishing.
- Indira Gandhi a/p Mutho v Pengarah Jabatan Agama Islam Perak [2018] 1 MLJ 545.
- Karam Singh v Menteri Hal Ehwal Dalam Negeri, Malaysia [1969] 2 MLJ 129.
- Loh Kooi Koon v Government of Malaysia [1977] 2 MLJ 187.
- Montesquieu, C. de S. (1748) The Spirit of Laws.
- Prevention of Crime Act 1959 (Malaysia).
- Security Offences (Special Measures) Act 2012 (Malaysia).
- Semenyih Jaya Sdn Bhd v Pentadbir Tanah Daerah Hulu Langat [2017] 3 MLJ 561.
- Sivarasa Rasiah v Badan Peguam Malaysia & Anor [2010] MLJ 333.
- Theresa Lim Chin Chin & Ors v Inspector General of Police [1988] 1 MLJ 293.
