There are several legal acts and statutes that are important for the UPSC Law Optional subject. Familiarity with these acts and statutes is crucial for a thorough understanding of the subject and to effectively answer questions in the examination. Here are some key acts and statutes that you should be familiar with:

1. Indian Penal Code (IPC):
- The IPC is a comprehensive code that defines and provides punishments for various criminal offenses in India.
- It is important to understand the different sections and offenses mentioned in the IPC, such as murder, theft, rape, etc.

2. Code of Criminal Procedure (CrPC):
- The CrPC lays down the procedures to be followed by the police and the courts during the investigation and trial of criminal cases.
- Familiarity with the provisions of the CrPC is necessary to understand the criminal justice system in India.

3. Code of Civil Procedure (CPC):
- The CPC governs the procedure to be followed in civil cases, including the filing of suits, court proceedings, and execution of decrees.
- Understanding the provisions of the CPC is important to comprehend the civil litigation process.

4. Constitution of India:
- The Constitution of India is a supreme legal document that lays down the framework for the governance of the country.
- Familiarity with the various provisions of the Constitution, such as fundamental rights, directive principles of state policy, and the powers and functions of different branches of government, is crucial.

5. Evidence Act:
- The Indian Evidence Act governs the admissibility, relevance, and weight of evidence in both criminal and civil cases.
- Understanding the provisions of the Evidence Act is essential to evaluate the credibility and reliability of evidence presented in court.

6. Specific Relief Act:
- The Specific Relief Act deals with the remedies available for the enforcement of civil rights and obligations.
- Familiarity with the provisions of this act is important to understand the various types of reliefs that can be sought in civil cases.

7. Limitation Act:
- The Limitation Act prescribes the time limit within which a legal action can be initiated.
- Understanding the provisions of the Limitation Act is crucial to determine whether a case is time-barred or can still be pursued.

8. Contract Act:
- The Indian Contract Act governs the law relating to contracts in India.
- Familiarity with the provisions of this act is important to understand the essentials of a valid contract, its formation, and the rights and liabilities of the parties involved.

These are some of the important acts and statutes that you should be familiar with for the UPSC Law Optional subject. It is advisable to study these acts in detail and gain a thorough understanding of their provisions to excel in the examination.