In any of the following circumstances, the marriage registration authority shall not register the marriage:
Below the legal age for marriage;
(2) Involuntary;
(3) One or both parties have spouses;
(4) Belonging to lineal blood relatives or collateral blood relatives within three generations;
(five) suffering from diseases that are medically considered unsuitable for marriage.
The following elements shall be recognized as essential elements of marriage as stipulated in the Marriage Law:
1. Both spouses must get married completely voluntarily;
2. Both spouses must reach legal age;
3. The husband and wife are not lineal blood relatives or collateral blood relatives within three generations;
4. Both husband and wife have no diseases that are medically considered unsuitable for marriage.