You can do drainlaying work if someone supervises you. This supervisor must have a current licence to supervise the work. The supervisor checks your work to ensure it is done well and meets the rules. You can assist with drainlaying if you are supervised by a licensed person. The supervisor tests the work to ensure it is competent and follows the rules of the Building Act 2004 and this Act. The supervisor makes sure the work is done correctly and safely. The supervisor is responsible for checking the work to ensure it meets the requirements. You can do the work under supervision, but the supervisor is in charge of ensuring it is done correctly. The work must meet the rules and regulations of the Acts.