Final answer:
An inspector certificate of competency for piping is not universally required but may be mandated by specific local or regional jurisdictions. Option 2 is correct, and it is important to check local regulations for exact requirements.
Step-by-step explanation:
The requirement for an inspector certificate of competency for piping depends on regulatory jurisdiction. Option 2 is the correct answer as in-service inspector certification for piping is generally not required unless it is specifically stated by a local or regional authority. However, it's important to note that regulations can vary substantially from one jurisdiction to another, and it's essential to consult the local codes and regulations to determine the precise requirements for a given area. For example, within Alberta, Canada, AB-513 may be a set of regulations that apply, but this would not be universally the case elsewhere.