The parents must get to know the other person well enough to be able to tell if the couple are likely to be happy together. Then they can add whatever prayers, music and so on that they wish. If a couple are spiritually united, they will be together in the next world too. If this happens, it is up to the parents and other relatives of the couple to try and bring them together again. If, after being separated for a year, the couple still wish to divorce, they can do so.
Smoking is also very strongly discouraged.
This means that they do not eat or drink for 12 hours from sunrise to sunset each day. Children under the age of 15 are exempt, so are pregnant and nursing mothers, people who are ill, people who are travelling a long distance, and those over 70 years old. The fast is a time to concentrate on spiritual things rather than material things. This is done every year by secret ballot, after prayers have been said, and without any nominations or canvassing. In each country there is also a National Spiritual Assembly, and every 5 years a world body is elected, called the Universal House of Justice.