§1. The director of novices is to be a member of the institute who has professed perpetual vows and has been legitimately designated.
§2. If necessary, the director can be given assistants who are subject to the director in regard to the supervision of the novices and the program of formation.
§3. Members who are carefully prepared and who, not impeded by other duties, can carry out this function fruitfully and in a stable manner are to be placed in charge of the formation of novices.
Source: Code of Canon Law (Vatican.va)