Marriage is union of body, mind and soul of the opposite sexes. There is no need of any permission for this marriage. Rituals are just for the society’s conviction and give some publicity to the event. Marriage registration is needed as per law of the country. So to marry, there is no need of anyone’s permission except by the boy and girl involved. This is my view of the custom. The highly superstitious one insists of many other rituals before and after marriage. You can follow them or not. By not following them also, progenies do take birth and life goes on.