Domestic Courts and their Relationship with International Law

Role of the ICJ: Discussed in Chapter 8, but the role of the International Court of Justice (ICJ) should not be overstated, as much of the work applying international law is conducted by domestic administrative agencies.
- Importance of domestic legal orders: Significant because states use their domestic legal systems to apply international law.
Theories on International and Domestic Law Relationship: This chapter examines two theories: Monism and Dualism.
- Concern regarding international law's reception: States may be reluctant to integrate international law into their legal systems, and various judicial techniques have evolved to avoid such integration.

Traditional View: Historically, international law and domestic law were viewed as separate (Dualist perspective).
- Authors such as Vattel in the 18th century believed that international law was mainly relevant at the inter-state level and had no relation to individuals or domestic law.
Shift in Understanding: In the 19th century, it was recognized that international law could affect domestic law structurally rather than incidentally (e.g., agreements on practical affairs like transport).

Definition of Dualism: The theory posits that international and domestic laws exist independently and govern different spheres (states vs. individuals).
- Historical assertions of Dualism:
- Heinrich Triepel: Proposed that international law deals with relations between states and does not affect individuals under domestic law.
  - Triepel's belief that individuals cannot be subjects of international law reflects the dualist perspective.
Implications of Dualism:
- International law's effectiveness in domestic law requires domestic legislation to implement it.
- Conflicting rules would be resolved in favor of domestic law within dualist systems.
- Outcome: States failing to respect international law could face international responsibility.
- Critiques of Dualism: Critics noted historical constraints on the individual’s position under international law, suggesting that states could evolve towards recognizing individual rights.

Definition of Monism: Opposes Dualism by viewing international and domestic laws as branches of the same system (Kelsen's perspective).
- Monists argue that international law is fundamental to the existence of states and dictates the legality of state actions.
Practical Consideration of Monism:
- Many international legal norms need domestic implementation to be effective, nurturing a symbiotic relationship between the two legal orders.
Consequences of Monism:
- International law could prevail over conflicting domestic regulations.
- Certain international rules may be directly effective in the domestic sphere without needing implementation.
Prevailing Systems: Many states tend to be mixed systems (neither exclusively monist nor dualist), making the distinction somewhat grey. Exclusively identifying as monist or dualist is rare as states decide their positioning on the spectrum.

Direct Effect Defined: Terms like 'direct effect', 'self-executing', and 'direct applicability' are often used interchangeably.
- Direct effect allows individuals to invoke international law provisions directly in domestic courts.
Legal Examples and Cases:
- The PCIJ's 1928 advisory opinion underscored that the intent of treaty parties influences the determination of direct effects.
- Chief Justice Marshall's opinion in Foster v. Neilson established a distinction between treaties acting independently and those needing legislative action for enforcement.
- Provisions that create direct rights, such as prohibitions against torture, can directly affect individuals.
- GATT article example implies conditionality dependent on legislative actions.

Understanding Incorporation: Dualist jurisdictions typically require transformation of international norms into domestic laws through various methods:
- Total Rewriting: Large treaties may necessitate extensive revisions to domestic codes (e.g., UNCLOS).
- In Blanco Incorporation: A simpler method where treaties are annexed, and their provisions hold the force of law.

Direct Adoption: Treaties integrate immediately into domestic law upon ratification, but issues arise concerning their hierarchical status compared to domestic laws.
- Local practices regarding the prioritization of treaties differ among states; for example, the Netherlands ranks treaties above domestic laws.
Legal Effects in Dualist States: Despite non-incorporation, treaties may still influence domestic laws, especially in ambiguous legal situations.

EU Law's Primacy: The reception of EU law into member states is dictated by EU law itself, not domestic law, making it unique in the international law context.
- The CJEU has determined that EU law holds an autonomous character, impacting Member State obligations.
Significant Case Example: Van Gend & Loos was foundational in establishing the CJEU’s position, affirming that EU law generates direct obligations for individuals and states, irrespective of domestic legislative controls.
- In this case, internal impediments to EU law's implementation were deemed inappropriate, ensuring uniform application across all member states.

Reassessment of Dualism: A contemporary reappraisal recognizes the value of dualism in protecting domestic legislation from international interference.
- Policy Considerations: Dualism remains pragmatic, allowing states to define and adapt international law while maintaining their legislative integrity.
Modern Judicial Interpretations: Recent cases such as Kadi and Medellin illustrate ongoing tensions between international obligations and domestic legal frameworks, often reflecting a shift towards prioritizing domestic over international considerations.

Judicial Avoidance: Domestic courts develop various strategies to avoid rulings on international law, such as:
- Political Question Doctrine: Avoiding cases that could have foreign policy implications.
- Act of State Doctrine: Courts refrain from adjudicating the legality of foreign sovereign actions within their jurisdiction.
- Forum Non Conveniens: Declaring another court as more suitable for the case, often to prevent forum shopping.

Emerging Trends: Domestic courts are increasingly applying international law, integrating both promises and threats into domestic legal systems.
- This evolution posits risks for international law if domestic courts adversely question international norms' validity.
Conclusion: The interplay between domestic and international law is deeply political, influencing how laws apply and are interpreted across various jurisdictions.