Jakob Hohnerlein’s research while affiliated with Max Planck Institute for Security and Privacy and other places

As modern constitutions bind democratic legislation to entrenched norms, they are in tension with the democratic idea that laws should be open to revision by new majorities. Against a widespread view, constitutional norms cannot be considered to be “more democratic” than ordinary laws due to specific qualities of the constitution-making process. Rather, the higher-level law of constitutions can fulfil a specific function as it may provide standards that ensure that laws made by the majority can be justified to everyone. On that basis, I evaluate for different types of constitutional norms whether there are good reasons for constraining legislation. In particular, entrenching cultural traditions and economic policy is more problematic than guarantees of the democratic process and rights ensuring respect for individuals. In sum, a two-tiered law-making system has important values, but people engaging in constitution-making and constitutional interpretation should be wary that the constitutional form is not abused.

International treaties create a layer of law that is particularly hard to change: While modern treaties entail significant constraints on domestic law-making, amendments require a new consensus of state parties. This creates a conflict with a core aspect of democratic constitutions: the power of new majorities to revise the laws made by their predecessors. In particular, several obligations of international economic law, namely regulatory stability promises in investment protection treaties, but also criminalization requirements under the UN drug control conventions face critique for overly diminishing domestic policy space. How can democratic constitutions deal with those tensions? One approach that is common in some countries accepts a power to legislate in violation of treaty obligations. But denying treaties the quality as real law in the domestic sphere risks to undermine the benefits of the instrument without truly solving the democracy concerns. Instead, democratic constitutions can be read to entail certain standards for engaging in treaties, namely (i) procedure-related duties to include denunciation clauses and political reform mechanisms in the treaty, and (ii) the need to establish a substantive justification for treaty constraints on future domestic law-making by legitimate aims of international constitutionalism or co-operation.