1. What is Abstract Review in Brazil?

Abstract review (also called concentrated review) means:

• Laws are challenged directly before the STF
• No need for a specific dispute or injury
• Focus is on the constitutionality of the law itself (in abstract)

This system is inspired by the Kelsenian model (Austria), where a central court reviews legislation.

2. Constitutional Basis

The system is provided under the Constitution of Brazil 1988, especially Articles:

• 102 → Powers of STF
• 103 → Who can file actions

3. Types of Abstract Review Actions

(a) Ação Direta de Inconstitucionalidade (ADI)

• Direct challenge to declare a law unconstitutional

(b) Ação Declaratória de Constitucionalidade (ADC)

• Seeks confirmation that a law is constitutional

(c) Arguição de Descumprimento de Preceito Fundamental (ADPF)

• Protects fundamental constitutional principles

(d) Ação Direta de Inconstitucionalidade por Omissão (ADO)

• Challenges legislative inaction

4. Who Can File? (Locus Standi)

Under Article 103:

• President
• Attorney General
• Political parties
• Bar associations
• State governors

👉 This broad access ensures democratic constitutional control.

5. Key Features of Abstract Review

(1) Erga Omnes Effect

• Decisions apply to everyone, not just parties

(2) Binding Effect

• All courts and authorities must follow STF rulings

(3) Prospective / Retroactive Effects

• STF may decide whether ruling applies forward or backward

(4) Precautionary Principle

• STF can suspend laws immediately (injunctions)

6. Important Case Laws

1. ADI 3510 Stem Cell Research Case

• Challenged law allowing embryonic stem cell research
• STF upheld the law
  👉 Balanced scientific progress vs right to life

2. ADPF 54 Anencephalic Fetus Case

• Allowed termination of pregnancy in case of anencephalic fetus
  👉 Recognized dignity and autonomy of women

3. ADI 4277 Same-Sex Union Case

• Recognized same-sex unions as family entities
  👉 Expanded equality and non-discrimination

4. ADI 1946 Social Security Reform Case

• Reviewed constitutionality of pension reforms
  👉 Demonstrated STF’s role in economic policy review

5. ADPF 130 Press Freedom Case

• Struck down authoritarian press law
  👉 Strengthened freedom of expression

6. ADI 939 Taxation Case

• Protected constitutional limits on taxation
  👉 Reinforced federal balance and rights

7. ADO 26 Homophobia Criminalization Case

• Recognized legislative omission in protecting LGBTQ+ persons
  👉 Criminalized homophobia under existing law

7. Doctrinal Principles Applied

(a) Supremacy of Constitution

All laws must conform to the Constitution

(b) Separation of Powers

• STF can strike laws
• But avoids excessive interference

(c) Living Constitution Doctrine

• Constitution evolves with society

(d) Proportionality Test

• Balances competing rights

8. Advantages of Brazilian Model

• Strong protection of fundamental rights
• Uniform constitutional interpretation
• Quick resolution of major legal questions

9. Criticism

• Judicial activism by STF
• Politicization of constitutional decisions
• Over-centralization of power

10. Conclusion

Brazil’s abstract review model represents a powerful centralized constitutional control system where the STF ensures:

• Protection of rights
• Balance of powers
• Constitutional supremacy

👉 It reflects a modern constitutional democracy where courts actively shape public policy while maintaining legal limits.