Child marriage is rampant among those who believe that Muhammad is the supreme example of conduct (cf. Qur'an 33:21), but Islamic spokesmen in the West frequently assert that it is a cultural phenomenon that has nothing to do with Islam. They did not, however, tell the mullahs.
"The Prophet wrote the (marriage contract) with 'Aisha while she was six years old and consummated his marriage with her while she was nine years old and she remained with him for nine years (i.e. till his death)." -- Bukhari 7.62.88
Muslims take this seriously and imitate Muhammad in this. Article 1041 of the Civil Code of the Islamic Republic of Iran states that girls can be engaged before the age of nine, and married at nine: "Marriage before puberty (nine full lunar years for girls) is prohibited. Marriage contracted before reaching puberty with the permission of the guardian is valid provided that the interests of the ward are duly observed."
The Ayatollah Khomeini himself married a ten-year-old girl when he was twenty-eight. Khomeini called marriage to a prepubescent girl "a divine blessing," and advised the faithful: "Do your best to ensure that your daughters do not see their first blood in your house."
"Iran seeks to legalise marriage for girls under 10," from Mohabat News, July 7 (thanks to Lachlan):
According to recently released statistics, in the past few weeks over 75 female children under 10 were forced to marry much older men. In 3929 cases, bride and groom were both under 14.
In a discussion of the issue organised by the Khabar Online news website, conservative law-maker and spokesperson for the Majles committee Mohammad Ali Isfenani said: "Before the revolution girls under 16 were not allowed to marry.
Parents determined to get around the law would often tamper with their daughter's birth certificate. Under the previous constitution, people were legally regarded as adults when they were 18. After the revolution the age at which children were regarded as going through puberty was lowered to 9 for girls and 15 for boys.
" [sic] He added: "As some people may not comply with our current Islamic legal system, we must regard 9 as being the appropriate age for a girl to have reached puberty and qualified to get married. To do otherwise would be to contradict and challenge Islamic Sharia law."