42. All actions and prosecutions against any person, which may be lawfully brought for anything done or intended to be done under the provisions of this Act, or under the general police-powers hereby given shall be commenced within three months after the act complained of shall have been committed, and not otherwise; and notice in writing of such action and of the cause thereof shall be given to the defendant, or to the District Superintendent or an Assistant District Superintendent of the district in which the act was committed, one month at least before the commencement of the action.