Notice to heirs of husband when his whereabouts nnknowa-

In a suit to which clause (i) of section 2 applies- (a) the names and addresses of the persons who would have been the heirs of the husband under Muslim law if he had died on tho date of t b filing of the plaint, shall be stated in the plaint, (b) notice of the suit shall be served on such persons, and (c) such persons shall have the right to ti3 heard in the suit: Provided that the paternal uncle and the brother of the husband, if any, shall be cited as parties.