A person who is licensed and registered to do PEW (prescribed electrical work) e.g. electrician, electrical engineer or inspector. They should have an ID card and you check their status on the EWRB website. Some people are registered but do not hold a license. If it is a complete rewire incuding new board and inlet plug etc then the person doing this can issue the first WoEF if not you will need an Inspector. Hope this helps.