In addition to the persons and entities to whom notice of hearing is required under Section 1822 or 2002, if the proposed conservatee is an absentee, a copy of the petition and notice of the time and place of the hearing shall be mailed at least 15 days before the hearing to the secretary concerned or to the head of the United States department or agency concerned, as the case may be. In such case, notice shall also be published pursuant to Section 6061 of the Government Code in a newspaper of general circulation in the county in which the hearing will be held.