Article 13 primarily has two clauses:

Clause (1): It states that any law existing in India before the commencement of the Constitution, which is inconsistent with the fundamental rights guaranteed under Part III of the Constitution, will be deemed void to the extent of the inconsistency. This means that if any law violates the fundamental rights, it can be struck down by the courts.

Clause (2): It prohibits the State (both the Union and State governments) from making any law that takes away or curtails the fundamental rights. Any law made in contravention of this clause will be considered void.

The purpose of Article 13 is to protect the fundamental rights of individuals and ensure that laws and actions of the government are in conformity with the Constitution. It empowers the judiciary to review legislation and executive actions and declare them null and void if they violate the fundamental rights guaranteed to the citizens of India. This provision plays a crucial role in maintaining the rule of law and upholding the supremacy of the Constitution in India.

Source: ChatGPT