Article 16 of the Declaration of the Rights of Man and of the Citizen of 1789 can be summarized in one sentence: “Any society in which the guarantee of rights is not assured, nor the separation of powers determined, has no constitution.” This formulation links two requirements, the protection of rights and the distribution of power, to define what a constitution is. Without these two conditions met, a text that organizes institutions does not deserve this qualification.
Guarantee of rights and separation of powers: the two conditions set by Article 16
Article 16 does not proclaim a subjective right like freedom of expression or property. It establishes a criterion for the validity of a constitutional order. If either of the two branches is lacking, the concerned society has “no constitution” in the sense of the Declaration of 1789.
The first branch, the guarantee of rights, implies that a concrete mechanism allows citizens to have their freedoms respected. A catalog of rights displayed without effective recourse does not fulfill this condition. The second branch, the separation of powers, requires that the legislative, executive, and judicial functions are not concentrated in the same hands.
These two requirements work together. A formal separation of powers that would leave a citizen without access to a judge would undermine the guarantee of rights. A right of appeal exercised before a judge subject to the executive power would be equally illusory. The Article 16 of the DDHC and its implications rests on this logic of complementarity between individual protection and institutional architecture.
Block of constitutionality: how Article 16 became a reference norm
The DDHC of 1789 has been part of the block of constitutionality in France since the Constitutional Council recognized its constitutional value. The preamble of the Constitution of 1958 refers to the preamble of 1946, which itself “reaffirms” the rights enshrined in 1789. This chain of references gives each article of the Declaration, including Article 16, a legal force equivalent to that of the provisions of the Constitution itself.
For a long time, Article 16 was rarely invoked before the Constitutional Council. The term “Article 16” referred more to Article 16 of the Constitution (exceptional powers of the President). The situation gradually changed from the 1990s, when the Council began to derive specific procedural requirements from the Declaration.
The role of the priority question of constitutionality
The introduction of the priority question of constitutionality (QPC) in 2010 multiplied the opportunities to invoke Article 16. Any litigant can now challenge, in the context of a dispute, the conformity of a legislative provision with the rights and freedoms guaranteed by the Constitution. Article 16 then serves as a basis to verify that the legislator has not infringed upon the right to effective recourse or the independence of the judge.
The Constitutional Council has associated several concrete guarantees with it:
- The right to effective judicial recourse, which requires that anyone can contest an act that harms them before a competent judge.
- The respect for the rights of the defense, including the right to be heard, access the file, and benefit from a reasonable time to prepare their defense.
- The requirement of independence and impartiality of the courts, which prohibits the legislator from creating procedures where the judge would accumulate incompatible functions.
- The prohibition of unjustified infringements on legally acquired situations by retroactive laws, unless there is a sufficient reason of general interest.
Article 16 of the DDHC and concrete litigation: effects on the competence of judges
Article 16 is not confined to constitutional theory. On November 7, 2012, the Court of Cassation ruled that the separation of powers justifies that the judicial judge hears actions for state liability for dysfunction of the judicial justice system. The idea is that entrusting this litigation to another jurisdiction would amount to subjecting the assessment of judicial functioning to an external power.
In this same decision, the Court specified that the fact that a judicial judge rules on an action directed against the state does not violate the requirement of impartiality derived from Article 16, as long as mechanisms for recusal allow for the exclusion of any conflict of interest in each case. Article 16 thus produces direct procedural effects on the determination of the competent judge.
Separation of powers and judicial police
The scope of Article 16 extends beyond the classic relationship between Parliament and Government. The control of the organization of the judicial police also falls under the separation of powers: the way investigations are directed, the functional subordination of the police to the public prosecutor, and the control of the investigating judge directly affect the balance between administrative authorities and judicial authority.
Current limits of the guarantee of rights in the face of algorithmic powers
The guarantee of rights as formulated in 1789 aimed at relationships between a citizen and identifiable institutions. The contemporary dispersion of decision-making centers, particularly towards algorithmic systems used by the administration or by private actors entrusted with missions of general interest, poses a problem that the text of Article 16 does not directly anticipate.
When an administrative decision relies on automated processing, the right to effective recourse implies that the litigant can understand and contest the criteria applied. If the opacity of the algorithm prevents this contestation, the guarantee of rights in the sense of Article 16 risks becoming formal without being real.
The French constitutional framework has not yet produced consolidated case law on this specific point. The question remains open: the Constitutional Council will have to determine whether Article 16 requires the legislator to provide mechanisms for algorithmic transparency so that the right to recourse retains its substance.
Article 16 of the DDHC has traversed more than two centuries without modification. Its strength lies in its abstraction: by establishing two structural conditions rather than a list of rights, it compels each generation to verify that the institutional architecture effectively protects freedoms. The next test will focus on the ability of this text to frame powers that its authors could not have imagined.
