Chapter 203 – Relatives for Whom Mourning Must be Observed
203.1) Observe the rite of mourning for fathers, mothers, sons, daughters, brothers, sisters, and married sisters, wives, and husbands.
203.2) Observe partial mourning for other relatives.
203.3) For a child who died within thirty days from its birth, you need not rend your garments.
203.4) For twins, if one dies within the thirty days and the other lives somewhat longer, the custom varies as to whether or not you rend your ) garments for the second twin.
203.5) When you hear about the death of a kinsman is the point at which you start to count the days of mourning.