According to The Canon Law, “The matrimonial covenant, by which a man and a woman establish between themselves a partnership of the whole of life and which is ordered by its nature to the good of the spouses and the procreation and education of offspring, has been raised by Christ the Lord to the dignity of a sacrament between the baptized. (Can. 1055 §1.)
Marriage is a sacrament and the groom and/or the bride must be baptized Catholics to be married in the church. Weddings at St. Augustine must be scheduled at least 10 months in advance.