Are you sure about that? Has licit been changed also? Who changed it and when? Are you familiar with Natural Moral Law?
I’m fairly certain. A valid baptism makes one a Christian. An invalid baptism means one is not baptized.
A valid Eucharist is the Body and Blood, Soul and Divinity of Jesus. An invalid Eucharist is just bread and wine.
A valid marriage effects a marriage. An invalid marriage means the two are not married (to each other).
The Catholic Church recognizes marriages between non-Catholics as valid.
The Catholic Church recognizes marriages between baptized Protestants as valid and sacramental.
The Catholic Church recognizes marriages between unbaptized persons as valid and natural.
The Catholic Church recognizes a marriage between an unbaptized person and a Catholic who has obtained the proper dispensations as valid and natural.
The Catholic Church recognizes a marriage between a baptized Protestant and a Catholic who has obtained the proper dispensations as valid and sacramental.
The Catholic Church recognizes a marriage between Catholics, according to the norms of canon law, as valid and sacramental.
There is no such thing as a natural but invalid marriage.
Licit means “conducted according to the law”. Illicit means “not conducted according to the law”. Illicit may still be valid.
I’m not aware that either of those words has changed meaning over the last several centuries. Perhaps you could enlighten me.
Please tell me about Natural Moral Law and how it applies to the current discussion.