context: The new province is named as "East Bengal and Assam", whose capital will be Dhaka and the adjoining headquarters will be Chittagong. It will have an area of ​​1,5,3 square miles and a population of 3 million, of which 1 million are Muslim and 12 million are Hindu. Its administration will consist of a legislative council and a revenue board consisting of two members and will retain the authority of the Calcutta High Court. The government directs that the western borders of East Bengal and Assam be clearly specified, as well as its geographical, ethnic, linguistic and social characteristics. The government announced their final decision on July 7, and the satire took effect on October 7 of the same year.
question: In what year was the announcement of the partition?