Any contract which restrains someone from marrying for one's whole life or even for a specified period of time is a restraint of marriage contract. In some countries, it is considered to be a void contract and cannot be enforced by law.
(3) Agreements in Restraint of Marriage-
Every individual enjoys the freedom to marry and so according to section 26 of the contract act "every agreement is restraint of the marriage of any person,...
mar·riage n. 1. A. The legal union of a man and woman as husband and wife. B. The state of being married; wedlock. C. A common-law marriage. D. A union between two persons having the customary but...
Marriage is a process in that one girl and boy give promise to each other that they will give support to each other in all their good and bad time. Free Matrimony http://www.matrimonyhouse.com
In most states you need to be 18 or older, but in some states you can marry anytime you want with written permission from a parent or legal guardian from both sides.