A more thorough explanation:

Commencement of action refers to the start of a legal proceeding. It is the point at which the judicial or administrative process begins. This process is usually initiated by filing a formal complaint.

For example, if someone wants to sue another person for breach of contract, they would need to file a complaint with the court. This would be the commencement of the legal action.

In another example, if a company wants to challenge a decision made by a government agency, they would need to file an administrative appeal. This would be the commencement of the administrative process.

These examples illustrate how the commencement of action is the starting point for any legal or administrative proceeding. Without this initial step, the case cannot move forward.