Cannot make themselves purchasers, on pain of nullity, either by themselves or by interposed persons:
Guardians, of the property of those of whom they have guardianship;
Agents, of the property they are charged with selling;
Administrators, of that of communes or public establishments entrusted to their care;
Public officers, of national property whose sales are made by their ministry;
Trustees, of the property or rights making up the trust estate.