Speaking from experience, just about every wedding has some special aspect. I mean: not just true love, but some quirk that makes things … interesting.
22. With regard to Marriage, it is by no means rare for special cases to arise: such as Marriage with a baptized non‑Catholic, with a catechumen, with a person who is simply unbaptized, or even with a person who has explicitly rejected the Catholic faith. Those in charge of pastoral care should keep in mind the norms of the Church pertaining to these types of cases, and they should, if the occasion requires, have recourse to the competent authority.
In other words, when a minister is out of his or her element, know when advice is needed. Or even referral.
The text cited in blue is from the English translation of The Order of Celebrating Matrimony © 2013, International Commission on English in the Liturgy Corporation. All rights reserved.