(1) In the cases governed by section 2162, a legacy remains effective even after the expiry of 30 years:
1. if it has been directed for the case in which a particular event occurs relating to the person of the person charged or the person provided for, and the person or person provided for concerning whom the event is to occur is alive at the time of the devolution of the inheritance;
2. if an heir, a reversionary heir or a legatee is charged with a legacy to the benefit of their brother or sister in the event that such a brother or sister is born.
(2) If the person charged or the person provided for with regard to whom the event is to occur is a legal person, the period of 30 years applies.