PRELIMINARY TITLE
The Judiciary and exercise of jurisdictional power
Article 20.
1. Justice shall be free in the cases established under the law.
2. A free justice system shall be regulated by law which makes effective the right declared in articles 24 and 119 of the Constitution in cases of insufficient resources for filing a court action.
3. Guarantees or deposits shall not be required when, due to their inappropriateness, they prevent the exercise of a class action, which shall always be free.
EDIT.