What are the answers to the following electrical licensing questions regarding commercial gain, codes of practice, responsible parties, and required checks?

Here are the solutions to the questions:

Question 16:
The holder of an electrical contractor's licence:

c) is allowed to work for commercial gain

Question 17:
Documents intended to advise electrical workers on the procedures necessary to ensure compliance with legislations are:

a) codes of practice

Question 18:
The people responsible for carrying out the electrical installation work in PNG are:

a) the licence electrical contractor, the licence electrician, the licence person who signs the Certificate of Compliance

Question 19:
The qualified licensed electrician as per the state or territory licensing requirements must perform the seven minimum checks and tests on installation work before supply is connected and the installation is energised.

a) seven