Which of the following best defines primary legislation?

• A. Delegated legislation
• B. Acts of Parliament
• C. International treaties
• D. Case law

Answer: (B)

Primary legislation are the laws made directly by Parliament in statute form. In the UK, these are Acts of Parliament that set out the main rules and obligations of the legal system. They are created through the bill process, approved by both Houses, and receive Royal Assent to become law, giving them the highest domestic authority.

Delegated legislation, by contrast, is law made by ministers or other bodies under powers granted by an Act. It fills in details or updates rules without Parliament drafting a new Act, so it sits below primary legislation.

International treaties are agreements with other states; they may create international obligations, but they require implementing domestic legislation to have effect in a country's legal system in most cases. They are not primary legislation themselves.

Case law consists of judicial decisions that interpret statutes or develop common-law rules; these are formed by the courts and help apply and expand the law, but they are not primary legislation created by Parliament.

So, the best definition of primary legislation is Acts of Parliament.