Section 4
SEC. 4. The Supreme Court and the Courts of First Instance shall have concurrent jurisdiction to prevent and restrain violations of this Act; and it shall be the duty of the Attorney-General, the Fiscal of the City of Manila and the provincial fiscal, or whoever may act in their stead, to institute proceedings to prevent and restrain such violations. Such proceedings may be by way of petition setting forth the case and praying that such violation shall be enjoined or otherwise prohibited. When the parties complained of shall have been duly notified of such petition the court shall proceed, as soon as may be, to the hearing and determination of the case; and pending such petition and before final decree, the court may at any time make such temporary restraining order or prohibition as shall be deemed just in the premises.