Canon 810

1. The impediment of public propriety arises: (1) from an invalid marriage after common life has been established; (2) from

notorious or public concubinage; (3) from the establishment of

common life of those who although bound to a required form for

the celebration of marriage, attempted it before a civil official

or non-Catholic minister. 2. This impediment invalidates marriage in the first degree of the direct line between a man and

the blood relatives of the woman and between a woman and the

blood relatives of the man.