Explanation:

Let’s break it down:

- Section 20 – This section in the Punjab Courts Act, 1918, talks about the appointment of District Judges but doesn’t cover Additional District Judges.

- Section 21 – Here’s your winner. This is the section that empowers the local government to appoint Additional District Judges when needed.

- Section 23 – Deals with the civil jurisdiction of the District Judge, not about appointments.

- Section 24 – Talks about the administrative control over Civil Courts, not about appointing judges.

So, Section 21 is exactly right for the appointment of Additional District Judges.