A separate permit shall be issued for each operation. Prior to undertaking any weather modification and control activities the licensee shall file with the department and also cause to be published a notice of intention. The licensee, if a permit is issued, shall confine his or her activities for the permitted operation within the time and area limits set forth in the notice of intention, unless modified by the department; and his or her activities shall also conform to any conditions imposed by the department upon the issuance of the permit or to the terms of the permit as modified after issuance.