What is the ruling on taking off the niqab on the wedding day and uncovering the face in front of the husband's brother, given that some believe it to be a virtue and not an obligation, while the questioner believes it to be an obligation?

Covering the hair of the head, neck, forearms, and legs is a jurisprudential obligation agreed upon by scholarly consensus. The ruling on covering the face and hands has been previously clarified. It is not permissible to uncover the face in front of a non-mahram, whether at a wedding or otherwise, even if he is the husband's brother or relative. The husband must understand this and be a helper to his wife in obeying Allah.