Assalaamu Alaykum,

Does the following ruling only apply when the tradition of that country or community is to pay the Mahr beforehand? Or also after it?

18. The practice in India is that the paying and receiving of mahr is undertaken after divorce or after death. When the woman is divorced, it is only then that she claims her mahr. Alternatively, when the husband dies and leaves behind some wealth, she takes her mahr from this left over wealth of his. If the woman dies, her inheritors claim the mahr. As long as the husband and wife are living together, no one pays the mahr nor does she ask for it. In such a situation, the woman cannot demand the mahr before divorce. However, it is wâjib on the man to give an amount that is normally given in that place on the first night. But if all these practices are not found in any place, these rules will not apply.

19. If the husband does not give the amount of mahr that is normally given beforehand, the wife has the right to refuse him to engage in sexual intercourse with her until he pays that amount. If they engaged in intercourse once, she still has the right of refusing him the next time or the following time if he does not pay the mahr. If he wishes to take her to another city or country, she has the right of not going unless her mahr is paid. Similarly, if the mahr is not paid and the woman wishes to travel to another city or country, or wishes to go to her parents home, and there is a mahram who can take her, then the husband does not have the right to stop her. But once he pays the mahr, she does not have the right to do any of these things without her husband's permission. It is not permissible for her to go anywhere without his consent. As for the husband, he can take her wherever he wishes. It is not permissible for her to refuse him.
http://www.jamiaashrafia.org/beta/ba...hr%20-%20Dowry