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. The legal basis for this overlap is found in Art 43, which outlines the structure of the Cabinet. 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 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 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 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.
In this context of executive paramountcy, the judiciary was constitutionally positioned as the primary check on the other two branches. While the executive and legislature are fused, the Federal Constitution establishes a clear separation between these two branches and the judiciary. The judiciary’s independence is fundamental to its role as the guardian of the Constitution. This role is derived from Article 4(1) of the Federal Constitution, which states that the Constitution is the supreme law of the Federation and any law passed after Merdeka Day which is inconsistent with the Constitution shall, to the extent of the inconsistency, be void. This provision establishes the principle of constitutional supremacy and empowers the judiciary to exercise judicial review.
Before 1988, the judiciary’s authority was explicitly grounded in the original wording of Article 121(1) of the Constitution, which vested the “judicial power of the Federation” in the High Courts and inferior courts. This ‘judicial power’ was not defined in the Constitution but was understood through common law tradition as an inherent power of the judiciary to interpret laws, adjudicate disputes, and ensure that the other branches of government act within their constitutional limits. It was this inherent power that formed the basis of the judiciary’s classical defence of the rule of law.
Throughout this classical period, the courts demonstrated a willingness to act as a check on executive power. An early example is the case of *Stephen Kalong Ningkan v Government of Malaysia* [1968] 2 MLJ 238. In this case, the Federal Court was asked to rule on the validity of a Proclamation of Emergency in Sarawak. While the court ultimately upheld the proclamation, it importantly asserted its jurisdiction to review the executive’s decision, establishing that even the exercise of emergency powers was not entirely beyond judicial scrutiny. This confirmed that the courts had a role in ensuring the executive acted within the bounds of the law, even in times of crisis.
The courts also asserted their role in controlling administrative power. In *Pengarah Tanah dan Galian, Wilayah Persekutuan v Sri Lempah Enterprise Sdn Bhd* [1979] 1 MLJ 135, the Federal Court held that administrative bodies could not impose conditions on land use approvals that were unrelated to the purpose of the governing statute. Raja Azlan Shah FJ (as he then was) famously stated that “unfettered discretion is a contradiction in terms” (p. 149). This decision was significant because it affirmed the principle that all discretionary powers must be exercised reasonably and for proper purposes, reinforcing the judiciary’s role in upholding the rule of law against administrative overreach.
Perhaps the most assertive judicial statement of this era came in *Public Prosecutor v Dato’ Yap Peng* [1987] 2 MLJ 311. The Supreme Court declared Section 418A of the Criminal Procedure Code unconstitutional. This provision allowed the Attorney General, who is part of the executive, to transfer a case from a subordinate court to the High Court at his discretion. The court held that this power was an integral part of judicial power, which, under the original Article 121(1), belonged exclusively to the judiciary. By giving this power to a member of the executive, Parliament had unconstitutionally encroached upon the judiciary’s domain. This decision was a direct defence of the separation of powers. However, this bold assertion of judicial power set the judiciary on a collision course with an executive that was accustomed to dominance, directly foreshadowing the constitutional crisis that would soon follow.
References
Bagehot, W. (1867) *The English Constitution*. Chapman and Hall.
Federal Constitution of Malaysia.
Faruqi, S. S. (2008) *Document of Destiny: The Constitution of the Federation of Malaysia*. Star Publications.
Harding, A. (2012) *The Constitution of Malaysia: A Contextual Analysis*. Hart Publishing.
*Indira Gandhi a/p Mutho v Pengarah Jabatan Agama Islam Perak & Ors and other appeals* [2018] 1 MLJ 545.
Montesquieu, C. (1748) *The Spirit of Laws*. (A. M. Cohler, B. C. Miller, & H. S. Stone, trans. and eds., 1989, Cambridge University Press).
*Pengarah Tanah dan Galian, Wilayah Persekutuan v Sri Lempah Enterprise Sdn Bhd* [1979] 1 MLJ 135.
Prevention of Crime Act 1959.
*Public Prosecutor v Dato’ Yap Peng* [1987] 2 MLJ 311.
Security Offences (Special Measures) Act 2012.
*Semenyih Jaya Sdn Bhd v Pentadbir Tanah Daerah Hulu Langat and another case* [2017] 3 MLJ 561.
*Sivarasa Rasiah v Badan Peguam Malaysia & Anor* [2010] 2 MLJ 333.
*Stephen Kalong Ningkan v Government of Malaysia* [1968] 2 MLJ 238.
