The board may appoint a committee composed of residents of the county to study the matter of changing the boundaries of the supervisorial districts. The committee shall make its report to the board of its findings on the need for change of boundaries, and the recommended changes, within six months after the final population figures determined in each federal decennial census have been released, but in any event not later than August 1st of the year following the year in which the census is taken. Recommendations of the committee are advisory only.