6. Unless he has already taken an oath as coroner or deputy coroner, every fire investigation commissioner or deputy commissioner and every person authorized to make an investigation or hold an inquiry under section 5 shall, before assuming his functions, take the oath of allegiance and of office according to the schedule to this act.
Such oath shall be taken before a judge, a commissioner per dedimus potestatem, a prothonotary of the Superior Court, a clerk of the Provincial Court, a clerk of the Crown, a clerk of the peace or a notary; deputy commissioners may also take such oath before the investigation commissioner to whom they are appointed.
A certificate of the taking of such oath shall be transmitted to the clerk of the peace of the judicial district comprising the territory for which the person who took it has been appointed.