The king has worked on modernizing the social structure of Bhutan. For example, besides declaring serfdom illegal, he has abolished polyandry and restricted polygamy to a maximum of three wives per man. Before taking a new wife, the man must obtain the permission of his first wife, who is free to seek a divorce and maintenance for life from the husband. The age for marriage has been raised to 16 for women and 21 for men. Once married the bride does not necessarily leave her home; it all depends on the strength of the two families as an agricultural labor force. The groom moves in if the bride's family's labor needs are greater. If both families have ample labor, then the couple may stake out their own plot of land and home.