A mere three weeks after assuming power, under the pretext of reversing the Shah's affinity for westernization and backed by a vocal conservative section of Iranian society, he revoked the divorce law. Khomeini went on to lower the minimum age of marriage for girls to 13 and even permitted girls as young as seven years old to be married if a physician signed a certificate agreeing to their sexual maturity, in keeping with Sharia law which dictates no minimum age for marriage beyond puberty.