Marriage in the Bible is a union between a man and a woman, with the consent of the woman's father or guardian, living together and attempting to procreate. No votes, no priest, no ritual, no prayer, no pronouncement, no license, and no registration are necessary. This is very different from the way we define and practice marriage today. Even if a couple is legally and ceremonially married but for some reason cannot have sexual relations, they are still considered married. In some countries, governments impose unbiblical requirements on marriage before it is legally recognized.
For those who have strong disagreements with the Catholic Church and its understanding of marriage as a sacrament, it would not be biblical to submit to marriage in the Catholic Church.