Canon 864

1. If either of the spouses causes serious danger to the other

spouse or to the children, or renders common life too hard, that

spouse gives the other a legitimate cause for separating in virtue of a decree of the local hierarch, or even on his or her own

authority if there is danger in delay. 2. In the particular

law of individual Churches sui iuris other reasons can be established according to the customs of the people and circumstances

of the place. 3. In all cases, when the reason for the separation ceases, the conjugal life is to be restored, unless it is

established otherwise by competent authority.