There is no such amendment in the existing law. Recent amendment is in proposal stage lying for discussion before rajya sabha and public opinion is solicited by 2nd oct. 2010 and it is not related to registration of marriages.
In HMA, one month notice is never necessary for registration of marriage.
In SMA, one month notice period is mandatory. But recently Delhi Assembly (but only for Delhi) made amendment in its rule saying that one month residence in Delhi (earlier it was mandatory) by any of the spouses is not necessary to get marriage registered in Delhi. This is to facilitate the boys and girls to come out of clutches of khap panchayats of neighbouring States and run away to Delhi and get their marriages registered under SMA. In addition to this, Justice Bhatt of Delhi High Court passed the order in one of his cases that if the parties to the marriage do not want, their marriage notices shall not be sent to the parents of the parties, as such step will defeat the very purpose for which people go for marriage under Special Marriage Act. As a result of this, the people who want to go for inter caste, inter religious, inter national marriages can go to Delhi and get their marriage registered without having residential status in Delhi and without getting their marriage intimated to their parents.