Section 1. The County Board of School Trustees in counties having a population of twenty-nine thousand, three hundred (29,300) to twenty-nine thousand, five hundred (29,500) and forty-six thousand, one hundred (46,100) to forty-six thousand two hundred (46,200), according to the last available Federal Census, may employ a rural school supervisor to plan, outline, and supervise the work of the primary and intermediate grades of the rural schools of the county, and shall meet with and advise with the County Board at all regular meetings.